/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:56:10,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:56:10,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:56:10,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:56:10,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:56:10,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:56:10,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:56:10,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:56:10,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:56:10,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:56:10,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:56:10,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:56:10,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:56:10,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:56:10,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:56:10,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:56:10,351 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 19:56:10,363 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-Delay.epf [2021-08-06 19:56:10,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:56:10,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:56:10,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:56:10,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:56:10,396 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:56:10,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:56:10,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:56:10,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:56:10,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:56:10,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:56:10,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:56:10,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:56:10,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:56:10,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:56:10,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:56:10,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:56:10,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:56:10,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:56:10,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:56:10,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:56:10,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:56:10,400 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:56:10,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:56:10,400 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:56:10,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:56:10,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:56:10,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:56:10,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:56:10,657 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:56:10,658 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:56:10,659 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-08-06 19:56:10,668 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-08-06 19:56:10,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:56:10,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:56:10,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:56:10,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:56:10,694 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:56:10,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,713 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:56:10,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:56:10,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:56:10,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:56:10,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:56:10,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:56:10,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:56:10,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:56:10,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/1) ... [2021-08-06 19:56:10,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:56:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:10,749 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:56:10,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:56:10,791 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:56:10,791 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:56:10,791 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:56:10,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:56:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:56:10,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:56:10,792 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:56:10,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:56:10,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:56:10,793 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:56:10,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:56:10,938 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-06 19:56:10,939 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 19:56:10,940 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:56:10 BoogieIcfgContainer [2021-08-06 19:56:10,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:56:10,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:56:10,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:56:10,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:56:10,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:56:10" (1/2) ... [2021-08-06 19:56:10,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e803107 and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:56:10, skipping insertion in model container [2021-08-06 19:56:10,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:56:10" (2/2) ... [2021-08-06 19:56:10,945 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-08-06 19:56:10,948 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:56:10,949 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:56:10,949 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:56:10,949 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:56:10,991 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 19:56:11,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:56:11,053 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:56:11,053 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 19:56:11,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:56:11,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:11,112 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:11,120 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:11,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1693748667, now seen corresponding path program 1 times [2021-08-06 19:56:11,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:11,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723120778] [2021-08-06 19:56:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:11,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:11,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:11,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:11,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723120778] [2021-08-06 19:56:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723120778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:56:11,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:56:11,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:56:11,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602219716] [2021-08-06 19:56:11,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:56:11,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:56:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:56:11,308 INFO L87 Difference]: Start difference. First operand has 30 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:11,328 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-08-06 19:56:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:56:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-06 19:56:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:11,337 INFO L225 Difference]: With dead ends: 54 [2021-08-06 19:56:11,337 INFO L226 Difference]: Without dead ends: 33 [2021-08-06 19:56:11,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:56:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-06 19:56:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-08-06 19:56:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2021-08-06 19:56:11,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 42 transitions. Word has length 11 [2021-08-06 19:56:11,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:11,363 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 42 transitions. [2021-08-06 19:56:11,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 42 transitions. [2021-08-06 19:56:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 19:56:11,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:11,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:11,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:56:11,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:11,369 INFO L82 PathProgramCache]: Analyzing trace with hash 573813990, now seen corresponding path program 1 times [2021-08-06 19:56:11,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:11,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746878011] [2021-08-06 19:56:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:11,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:11,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:11,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746878011] [2021-08-06 19:56:11,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746878011] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:56:11,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:56:11,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:56:11,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694841886] [2021-08-06 19:56:11,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:56:11,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:11,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:56:11,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:56:11,429 INFO L87 Difference]: Start difference. First operand 28 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:11,442 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2021-08-06 19:56:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:56:11,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-06 19:56:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:11,444 INFO L225 Difference]: With dead ends: 29 [2021-08-06 19:56:11,444 INFO L226 Difference]: Without dead ends: 29 [2021-08-06 19:56:11,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:56:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-06 19:56:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-08-06 19:56:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2021-08-06 19:56:11,453 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 40 transitions. Word has length 13 [2021-08-06 19:56:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:11,453 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 40 transitions. [2021-08-06 19:56:11,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 40 transitions. [2021-08-06 19:56:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:56:11,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:11,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:11,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:56:11,457 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash 609695206, now seen corresponding path program 1 times [2021-08-06 19:56:11,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:11,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682284359] [2021-08-06 19:56:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:11,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:11,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:11,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682284359] [2021-08-06 19:56:11,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682284359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:11,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391320314] [2021-08-06 19:56:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:11,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:11,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:11,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:56:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:11,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:56:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:11,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 19:56:12,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:12,074 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:12,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391320314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:12,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:12,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-06 19:56:12,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401481576] [2021-08-06 19:56:12,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:56:12,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:12,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:56:12,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:56:12,082 INFO L87 Difference]: Start difference. First operand 27 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:12,138 INFO L93 Difference]: Finished difference Result 52 states and 80 transitions. [2021-08-06 19:56:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:56:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:56:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:12,139 INFO L225 Difference]: With dead ends: 52 [2021-08-06 19:56:12,139 INFO L226 Difference]: Without dead ends: 45 [2021-08-06 19:56:12,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:56:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-06 19:56:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2021-08-06 19:56:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 54 transitions. [2021-08-06 19:56:12,142 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 54 transitions. Word has length 16 [2021-08-06 19:56:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:12,143 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 54 transitions. [2021-08-06 19:56:12,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 54 transitions. [2021-08-06 19:56:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:56:12,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:12,143 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:12,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:12,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:12,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1383769658, now seen corresponding path program 1 times [2021-08-06 19:56:12,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:12,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914128011] [2021-08-06 19:56:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:12,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:56:12,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:12,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914128011] [2021-08-06 19:56:12,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914128011] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:56:12,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:56:12,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:56:12,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096667942] [2021-08-06 19:56:12,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:56:12,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:56:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:56:12,381 INFO L87 Difference]: Start difference. First operand 35 states and 54 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:12,392 INFO L93 Difference]: Finished difference Result 41 states and 65 transitions. [2021-08-06 19:56:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:56:12,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:56:12,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:12,393 INFO L225 Difference]: With dead ends: 41 [2021-08-06 19:56:12,393 INFO L226 Difference]: Without dead ends: 41 [2021-08-06 19:56:12,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:56:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-06 19:56:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-08-06 19:56:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 53 transitions. [2021-08-06 19:56:12,406 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 53 transitions. Word has length 16 [2021-08-06 19:56:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:12,407 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 53 transitions. [2021-08-06 19:56:12,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 53 transitions. [2021-08-06 19:56:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:56:12,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:12,407 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:12,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:56:12,407 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2019748793, now seen corresponding path program 2 times [2021-08-06 19:56:12,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:12,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736798732] [2021-08-06 19:56:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:12,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:12,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:12,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736798732] [2021-08-06 19:56:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736798732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:56:12,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:56:12,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:56:12,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358338570] [2021-08-06 19:56:12,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:56:12,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:56:12,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:56:12,467 INFO L87 Difference]: Start difference. First operand 35 states and 53 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-08-06 19:56:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:12,488 INFO L93 Difference]: Finished difference Result 90 states and 137 transitions. [2021-08-06 19:56:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:56:12,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 18 [2021-08-06 19:56:12,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:12,491 INFO L225 Difference]: With dead ends: 90 [2021-08-06 19:56:12,491 INFO L226 Difference]: Without dead ends: 90 [2021-08-06 19:56:12,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:56:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-06 19:56:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-08-06 19:56:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.7540983606557377) internal successors, (107), 61 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 107 transitions. [2021-08-06 19:56:12,505 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 107 transitions. Word has length 18 [2021-08-06 19:56:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:12,505 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 107 transitions. [2021-08-06 19:56:12,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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) [2021-08-06 19:56:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 107 transitions. [2021-08-06 19:56:12,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:56:12,506 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:12,507 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:12,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 19:56:12,507 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2052485403, now seen corresponding path program 3 times [2021-08-06 19:56:12,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:12,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056860913] [2021-08-06 19:56:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:12,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:56:12,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:12,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056860913] [2021-08-06 19:56:12,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056860913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:12,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590658062] [2021-08-06 19:56:12,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:12,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:12,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:12,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:12,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:56:12,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:56:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 19:56:12,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:12,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 19:56:12,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 41.7 percent of original size [2021-08-06 19:56:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:56:12,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590658062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:12,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:12,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-06 19:56:12,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687349838] [2021-08-06 19:56:12,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:56:12,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:56:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:56:12,703 INFO L87 Difference]: Start difference. First operand 62 states and 107 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-08-06 19:56:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:12,714 INFO L93 Difference]: Finished difference Result 85 states and 137 transitions. [2021-08-06 19:56:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:56:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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 21 [2021-08-06 19:56:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:12,715 INFO L225 Difference]: With dead ends: 85 [2021-08-06 19:56:12,715 INFO L226 Difference]: Without dead ends: 85 [2021-08-06 19:56:12,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:56:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-06 19:56:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-08-06 19:56:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6835443037974684) internal successors, (133), 79 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:12,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 133 transitions. [2021-08-06 19:56:12,731 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 133 transitions. Word has length 21 [2021-08-06 19:56:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:12,731 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 133 transitions. [2021-08-06 19:56:12,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2021-08-06 19:56:12,732 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 133 transitions. [2021-08-06 19:56:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:56:12,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:12,732 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:12,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 19:56:12,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-06 19:56:12,945 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:12,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash 249017029, now seen corresponding path program 1 times [2021-08-06 19:56:12,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:12,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549178572] [2021-08-06 19:56:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:12,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:13,017 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 19:56:13,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 19:56:13,045 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:56:13,048 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 19:56:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:13,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:13,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549178572] [2021-08-06 19:56:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549178572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:13,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060022600] [2021-08-06 19:56:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:13,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:13,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:13,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:13,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:56:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:56:13,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:13,548 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 19:56:13,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-08-06 19:56:13,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:13,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:13,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060022600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:13,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:13,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 19:56:13,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219906110] [2021-08-06 19:56:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:56:13,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:56:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:56:13,634 INFO L87 Difference]: Start difference. First operand 80 states and 133 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-08-06 19:56:13,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:13,717 INFO L93 Difference]: Finished difference Result 131 states and 221 transitions. [2021-08-06 19:56:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:56:13,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21 [2021-08-06 19:56:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:13,719 INFO L225 Difference]: With dead ends: 131 [2021-08-06 19:56:13,719 INFO L226 Difference]: Without dead ends: 122 [2021-08-06 19:56:13,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:56:13,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-06 19:56:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 92. [2021-08-06 19:56:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.6813186813186813) internal successors, (153), 91 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) [2021-08-06 19:56:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 153 transitions. [2021-08-06 19:56:13,722 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 153 transitions. Word has length 21 [2021-08-06 19:56:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:13,722 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 153 transitions. [2021-08-06 19:56:13,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-08-06 19:56:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 153 transitions. [2021-08-06 19:56:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:56:13,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:13,723 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:13,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:13,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:13,933 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash -899358851, now seen corresponding path program 2 times [2021-08-06 19:56:13,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:13,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526766670] [2021-08-06 19:56:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:13,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:14,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 19:56:14,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 19:56:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:14,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:14,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526766670] [2021-08-06 19:56:14,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526766670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:14,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471303559] [2021-08-06 19:56:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:14,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:14,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:14,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:56:14,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:14,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:14,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:56:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:14,557 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 19:56:14,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-08-06 19:56:14,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:14,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:14,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471303559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:14,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:14,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 19:56:14,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025310966] [2021-08-06 19:56:14,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:56:14,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:56:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:56:14,611 INFO L87 Difference]: Start difference. First operand 92 states and 153 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-08-06 19:56:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:14,697 INFO L93 Difference]: Finished difference Result 159 states and 267 transitions. [2021-08-06 19:56:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:56:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 21 [2021-08-06 19:56:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:14,698 INFO L225 Difference]: With dead ends: 159 [2021-08-06 19:56:14,698 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 19:56:14,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:56:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 19:56:14,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 96. [2021-08-06 19:56:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.6736842105263159) internal successors, (159), 95 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2021-08-06 19:56:14,701 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 21 [2021-08-06 19:56:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:14,702 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2021-08-06 19:56:14,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-08-06 19:56:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2021-08-06 19:56:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:56:14,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:14,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:14,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:14,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2058805031, now seen corresponding path program 3 times [2021-08-06 19:56:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:14,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201357524] [2021-08-06 19:56:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:14,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:15,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:15,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201357524] [2021-08-06 19:56:15,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201357524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:15,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943408375] [2021-08-06 19:56:15,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:15,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:15,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:15,050 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:15,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:56:15,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:56:15,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 19:56:15,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:15,415 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 19:56:15,415 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-08-06 19:56:15,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:15,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:15,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943408375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:15,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:15,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 19:56:15,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66744287] [2021-08-06 19:56:15,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:56:15,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:56:15,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:56:15,463 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:15,551 INFO L93 Difference]: Finished difference Result 142 states and 234 transitions. [2021-08-06 19:56:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:56:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:56:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:15,554 INFO L225 Difference]: With dead ends: 142 [2021-08-06 19:56:15,554 INFO L226 Difference]: Without dead ends: 133 [2021-08-06 19:56:15,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:56:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-06 19:56:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2021-08-06 19:56:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.6732673267326732) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 169 transitions. [2021-08-06 19:56:15,565 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 169 transitions. Word has length 21 [2021-08-06 19:56:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:15,566 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 169 transitions. [2021-08-06 19:56:15,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 169 transitions. [2021-08-06 19:56:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:56:15,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:15,568 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:15,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:15,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:15,773 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash -994610872, now seen corresponding path program 4 times [2021-08-06 19:56:15,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:15,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929227800] [2021-08-06 19:56:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:15,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:15,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:15,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929227800] [2021-08-06 19:56:15,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929227800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:15,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497589281] [2021-08-06 19:56:15,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:56:15,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:15,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:15,820 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:15,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:56:15,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:56:15,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:56:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:16,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:56:16,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:56:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:16,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497589281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:16,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:16,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 19:56:16,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844159910] [2021-08-06 19:56:16,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:56:16,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:56:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:56:16,086 INFO L87 Difference]: Start difference. First operand 102 states and 169 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:16,103 INFO L93 Difference]: Finished difference Result 205 states and 327 transitions. [2021-08-06 19:56:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:56:16,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:56:16,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:16,104 INFO L225 Difference]: With dead ends: 205 [2021-08-06 19:56:16,104 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 19:56:16,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:56:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 19:56:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 129. [2021-08-06 19:56:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.703125) internal successors, (218), 128 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 218 transitions. [2021-08-06 19:56:16,107 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 218 transitions. Word has length 23 [2021-08-06 19:56:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:16,107 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 218 transitions. [2021-08-06 19:56:16,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:16,107 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 218 transitions. [2021-08-06 19:56:16,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:16,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:16,108 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:16,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:16,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:16,322 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1084179814, now seen corresponding path program 5 times [2021-08-06 19:56:16,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:16,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273819352] [2021-08-06 19:56:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:16,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:16,411 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:16,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:16,434 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:56:16,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:56:16,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:16,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:16,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:16,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:56:16,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:16,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273819352] [2021-08-06 19:56:16,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273819352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:16,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891864923] [2021-08-06 19:56:16,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:56:16,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:16,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:16,546 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:16,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:56:16,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:56:16,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:16,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:17,181 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 19:56:17,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 19:56:17,229 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:17,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:17,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891864923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:17,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:17,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-06 19:56:17,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812226828] [2021-08-06 19:56:17,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:56:17,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:56:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:56:17,235 INFO L87 Difference]: Start difference. First operand 129 states and 218 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:17,366 INFO L93 Difference]: Finished difference Result 253 states and 418 transitions. [2021-08-06 19:56:17,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:56:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:17,368 INFO L225 Difference]: With dead ends: 253 [2021-08-06 19:56:17,368 INFO L226 Difference]: Without dead ends: 211 [2021-08-06 19:56:17,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:17,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-06 19:56:17,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 161. [2021-08-06 19:56:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.7) internal successors, (272), 160 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 272 transitions. [2021-08-06 19:56:17,371 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 272 transitions. Word has length 26 [2021-08-06 19:56:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:17,371 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 272 transitions. [2021-08-06 19:56:17,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 272 transitions. [2021-08-06 19:56:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:17,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:17,372 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:17,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:17,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:17,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:17,585 INFO L82 PathProgramCache]: Analyzing trace with hash -389792290, now seen corresponding path program 6 times [2021-08-06 19:56:17,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:17,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985222496] [2021-08-06 19:56:17,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:17,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:17,658 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:17,659 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:17,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:56:17,678 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:56:17,711 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:17,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:17,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985222496] [2021-08-06 19:56:17,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985222496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:17,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224768671] [2021-08-06 19:56:17,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:56:17,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:17,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:17,826 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:17,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:56:18,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:56:18,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:18,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:18,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:18,576 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 19:56:18,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 19:56:18,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:18,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:18,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224768671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:18,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:18,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-06 19:56:18,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132251012] [2021-08-06 19:56:18,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:18,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:18,628 INFO L87 Difference]: Start difference. First operand 161 states and 272 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:18,781 INFO L93 Difference]: Finished difference Result 287 states and 490 transitions. [2021-08-06 19:56:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:56:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:18,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:18,784 INFO L225 Difference]: With dead ends: 287 [2021-08-06 19:56:18,784 INFO L226 Difference]: Without dead ends: 269 [2021-08-06 19:56:18,784 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-08-06 19:56:18,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 172. [2021-08-06 19:56:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.6900584795321638) internal successors, (289), 171 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 289 transitions. [2021-08-06 19:56:18,791 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 289 transitions. Word has length 26 [2021-08-06 19:56:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:18,792 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 289 transitions. [2021-08-06 19:56:18,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:18,792 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 289 transitions. [2021-08-06 19:56:18,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:18,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:18,793 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:18,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:19,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 19:56:19,005 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:19,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:19,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1064823240, now seen corresponding path program 7 times [2021-08-06 19:56:19,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:19,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304408082] [2021-08-06 19:56:19,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:19,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:19,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:19,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:19,077 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:56:19,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:56:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:19,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:19,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304408082] [2021-08-06 19:56:19,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304408082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:19,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627162743] [2021-08-06 19:56:19,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:56:19,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:19,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:19,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:19,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:56:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:19,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:19,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:19,960 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 19:56:19,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 19:56:20,014 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:20,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:20,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627162743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:20,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:20,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-06 19:56:20,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868807934] [2021-08-06 19:56:20,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:20,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:20,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:20,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:20,022 INFO L87 Difference]: Start difference. First operand 172 states and 289 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:20,180 INFO L93 Difference]: Finished difference Result 289 states and 489 transitions. [2021-08-06 19:56:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:56:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:20,182 INFO L225 Difference]: With dead ends: 289 [2021-08-06 19:56:20,182 INFO L226 Difference]: Without dead ends: 280 [2021-08-06 19:56:20,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-06 19:56:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 175. [2021-08-06 19:56:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.6896551724137931) internal successors, (294), 174 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 294 transitions. [2021-08-06 19:56:20,185 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 294 transitions. Word has length 26 [2021-08-06 19:56:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:20,185 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 294 transitions. [2021-08-06 19:56:20,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 294 transitions. [2021-08-06 19:56:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:20,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:20,186 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:20,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:20,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 19:56:20,397 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash 74009518, now seen corresponding path program 8 times [2021-08-06 19:56:20,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:20,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939024083] [2021-08-06 19:56:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:20,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:20,467 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:20,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:20,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:20,538 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:20,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:20,562 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:56:20,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:20,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939024083] [2021-08-06 19:56:20,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939024083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:20,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291672714] [2021-08-06 19:56:20,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:20,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:20,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:20,621 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:20,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:56:20,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:20,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:20,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:20,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:21,437 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 19:56:21,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 19:56:21,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:21,501 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:21,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291672714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:21,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:21,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-08-06 19:56:21,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164648922] [2021-08-06 19:56:21,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:56:21,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:21,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:56:21,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:56:21,507 INFO L87 Difference]: Start difference. First operand 175 states and 294 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:21,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:21,679 INFO L93 Difference]: Finished difference Result 415 states and 681 transitions. [2021-08-06 19:56:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:21,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:21,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:21,680 INFO L225 Difference]: With dead ends: 415 [2021-08-06 19:56:21,680 INFO L226 Difference]: Without dead ends: 346 [2021-08-06 19:56:21,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:56:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-06 19:56:21,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 198. [2021-08-06 19:56:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.6903553299492386) internal successors, (333), 197 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 333 transitions. [2021-08-06 19:56:21,688 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 333 transitions. Word has length 26 [2021-08-06 19:56:21,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:21,688 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 333 transitions. [2021-08-06 19:56:21,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:21,689 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 333 transitions. [2021-08-06 19:56:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:21,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:21,690 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:21,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:21,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 19:56:21,905 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1399962586, now seen corresponding path program 9 times [2021-08-06 19:56:21,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:21,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48498859] [2021-08-06 19:56:21,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:21,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:21,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:21,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:22,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:22,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:22,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:22,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48498859] [2021-08-06 19:56:22,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48498859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:22,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918341239] [2021-08-06 19:56:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:22,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:22,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:22,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:22,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:56:22,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:56:22,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:22,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 19:56:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:23,129 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-08-06 19:56:23,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 51 [2021-08-06 19:56:23,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:23,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:23,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918341239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:23,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:23,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-06 19:56:23,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613540591] [2021-08-06 19:56:23,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:23,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:23,185 INFO L87 Difference]: Start difference. First operand 198 states and 333 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:23,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:23,504 INFO L93 Difference]: Finished difference Result 459 states and 760 transitions. [2021-08-06 19:56:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:56:23,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:23,506 INFO L225 Difference]: With dead ends: 459 [2021-08-06 19:56:23,506 INFO L226 Difference]: Without dead ends: 405 [2021-08-06 19:56:23,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:56:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-06 19:56:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 189. [2021-08-06 19:56:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.702127659574468) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:23,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 320 transitions. [2021-08-06 19:56:23,510 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 320 transitions. Word has length 26 [2021-08-06 19:56:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:23,510 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 320 transitions. [2021-08-06 19:56:23,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 320 transitions. [2021-08-06 19:56:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:23,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:23,512 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:23,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:23,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 19:56:23,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash 54652944, now seen corresponding path program 10 times [2021-08-06 19:56:23,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:23,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116145749] [2021-08-06 19:56:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:23,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:23,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:23,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:23,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:23,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116145749] [2021-08-06 19:56:23,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116145749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:23,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053327571] [2021-08-06 19:56:23,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:56:23,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:23,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:23,908 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:23,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:56:24,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:56:24,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:24,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:24,799 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 19:56:24,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 19:56:24,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:24,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:24,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053327571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:24,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:24,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-06 19:56:24,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079467848] [2021-08-06 19:56:24,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:24,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:24,859 INFO L87 Difference]: Start difference. First operand 189 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:25,042 INFO L93 Difference]: Finished difference Result 368 states and 624 transitions. [2021-08-06 19:56:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:25,043 INFO L225 Difference]: With dead ends: 368 [2021-08-06 19:56:25,043 INFO L226 Difference]: Without dead ends: 359 [2021-08-06 19:56:25,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:56:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-06 19:56:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 189. [2021-08-06 19:56:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.702127659574468) internal successors, (320), 188 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 320 transitions. [2021-08-06 19:56:25,048 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 320 transitions. Word has length 26 [2021-08-06 19:56:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:25,048 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 320 transitions. [2021-08-06 19:56:25,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 320 transitions. [2021-08-06 19:56:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:25,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:25,048 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:25,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:25,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 19:56:25,261 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash 906668680, now seen corresponding path program 11 times [2021-08-06 19:56:25,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:25,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147092277] [2021-08-06 19:56:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:25,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:25,316 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:25,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:56:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:25,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:25,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147092277] [2021-08-06 19:56:25,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147092277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:25,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186374902] [2021-08-06 19:56:25,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:56:25,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:25,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:25,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:25,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:56:25,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:56:25,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:25,813 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:25,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:26,352 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 19:56:26,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 37 [2021-08-06 19:56:26,397 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:26,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:26,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186374902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:26,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:26,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-08-06 19:56:26,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086234133] [2021-08-06 19:56:26,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:56:26,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:56:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:26,403 INFO L87 Difference]: Start difference. First operand 189 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:26,555 INFO L93 Difference]: Finished difference Result 322 states and 550 transitions. [2021-08-06 19:56:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:56:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:26,556 INFO L225 Difference]: With dead ends: 322 [2021-08-06 19:56:26,557 INFO L226 Difference]: Without dead ends: 313 [2021-08-06 19:56:26,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:56:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-06 19:56:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 198. [2021-08-06 19:56:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.700507614213198) internal successors, (335), 197 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 335 transitions. [2021-08-06 19:56:26,560 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 335 transitions. Word has length 26 [2021-08-06 19:56:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:26,560 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 335 transitions. [2021-08-06 19:56:26,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 335 transitions. [2021-08-06 19:56:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:26,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:26,561 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:26,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:26,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 19:56:26,765 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:26,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:26,765 INFO L82 PathProgramCache]: Analyzing trace with hash 613844548, now seen corresponding path program 12 times [2021-08-06 19:56:26,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:26,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122111054] [2021-08-06 19:56:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:26,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:26,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:26,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:26,892 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:26,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:56:26,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:26,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122111054] [2021-08-06 19:56:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122111054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:26,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390866472] [2021-08-06 19:56:26,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:56:26,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:26,945 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:26,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:56:27,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:56:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:27,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:27,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:27,792 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 19:56:27,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-06 19:56:27,836 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:27,836 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:27,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390866472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:27,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:27,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-08-06 19:56:27,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752310539] [2021-08-06 19:56:27,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:56:27,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:56:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:56:27,842 INFO L87 Difference]: Start difference. First operand 198 states and 335 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:28,039 INFO L93 Difference]: Finished difference Result 467 states and 759 transitions. [2021-08-06 19:56:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:56:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:28,042 INFO L225 Difference]: With dead ends: 467 [2021-08-06 19:56:28,042 INFO L226 Difference]: Without dead ends: 386 [2021-08-06 19:56:28,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:56:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-06 19:56:28,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 236. [2021-08-06 19:56:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.6978723404255318) internal successors, (399), 235 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:28,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 399 transitions. [2021-08-06 19:56:28,047 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 399 transitions. Word has length 26 [2021-08-06 19:56:28,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:28,047 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 399 transitions. [2021-08-06 19:56:28,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:28,047 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 399 transitions. [2021-08-06 19:56:28,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:28,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:28,048 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:28,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:28,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:28,261 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash -860127556, now seen corresponding path program 13 times [2021-08-06 19:56:28,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:28,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625678508] [2021-08-06 19:56:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:28,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:28,380 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:28,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 69.4 percent of original size [2021-08-06 19:56:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:28,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:28,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625678508] [2021-08-06 19:56:28,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625678508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:28,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103605352] [2021-08-06 19:56:28,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:56:28,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:28,464 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:28,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:56:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:28,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:29,380 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 19:56:29,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-06 19:56:29,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:29,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:29,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103605352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:29,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:29,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-06 19:56:29,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305707918] [2021-08-06 19:56:29,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:56:29,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:56:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:56:29,433 INFO L87 Difference]: Start difference. First operand 236 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:29,657 INFO L93 Difference]: Finished difference Result 496 states and 846 transitions. [2021-08-06 19:56:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:56:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:29,658 INFO L225 Difference]: With dead ends: 496 [2021-08-06 19:56:29,659 INFO L226 Difference]: Without dead ends: 469 [2021-08-06 19:56:29,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 223.1ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:56:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-06 19:56:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 233. [2021-08-06 19:56:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.6982758620689655) internal successors, (394), 232 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 394 transitions. [2021-08-06 19:56:29,664 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 394 transitions. Word has length 26 [2021-08-06 19:56:29,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:29,664 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 394 transitions. [2021-08-06 19:56:29,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 394 transitions. [2021-08-06 19:56:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:29,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:29,664 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:29,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:29,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:29,885 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:29,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:29,885 INFO L82 PathProgramCache]: Analyzing trace with hash 594487974, now seen corresponding path program 14 times [2021-08-06 19:56:29,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:29,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444699231] [2021-08-06 19:56:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:29,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:30,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:30,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444699231] [2021-08-06 19:56:30,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444699231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:30,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043026259] [2021-08-06 19:56:30,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:30,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:30,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:30,105 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:30,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:56:30,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:30,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:31,056 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 19:56:31,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-06 19:56:31,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:31,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043026259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:31,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:31,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-06 19:56:31,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910856740] [2021-08-06 19:56:31,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:56:31,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:56:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:56:31,106 INFO L87 Difference]: Start difference. First operand 233 states and 394 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:31,336 INFO L93 Difference]: Finished difference Result 424 states and 718 transitions. [2021-08-06 19:56:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:56:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:31,338 INFO L225 Difference]: With dead ends: 424 [2021-08-06 19:56:31,338 INFO L226 Difference]: Without dead ends: 415 [2021-08-06 19:56:31,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:56:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-08-06 19:56:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 232. [2021-08-06 19:56:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.7012987012987013) internal successors, (393), 231 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 393 transitions. [2021-08-06 19:56:31,342 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 393 transitions. Word has length 26 [2021-08-06 19:56:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:31,342 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 393 transitions. [2021-08-06 19:56:31,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:31,343 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 393 transitions. [2021-08-06 19:56:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:31,343 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:31,343 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:31,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:31,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:31,544 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:31,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1446503710, now seen corresponding path program 15 times [2021-08-06 19:56:31,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:31,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069541094] [2021-08-06 19:56:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:31,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:31,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:31,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069541094] [2021-08-06 19:56:31,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069541094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:31,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385746611] [2021-08-06 19:56:31,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:31,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:31,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:31,732 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:31,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:56:32,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:56:32,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:32,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:32,757 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-06 19:56:32,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 34 [2021-08-06 19:56:32,810 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:32,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:32,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385746611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:32,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:32,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-08-06 19:56:32,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169817814] [2021-08-06 19:56:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:56:32,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:32,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:56:32,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:56:32,817 INFO L87 Difference]: Start difference. First operand 232 states and 393 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:33,035 INFO L93 Difference]: Finished difference Result 411 states and 699 transitions. [2021-08-06 19:56:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:56:33,035 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:33,036 INFO L225 Difference]: With dead ends: 411 [2021-08-06 19:56:33,036 INFO L226 Difference]: Without dead ends: 402 [2021-08-06 19:56:33,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:56:33,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-08-06 19:56:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 217. [2021-08-06 19:56:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.6944444444444444) internal successors, (366), 216 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 366 transitions. [2021-08-06 19:56:33,041 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 366 transitions. Word has length 26 [2021-08-06 19:56:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 366 transitions. [2021-08-06 19:56:33,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 366 transitions. [2021-08-06 19:56:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:56:33,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:33,042 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:33,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:33,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:33,257 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:33,257 INFO L82 PathProgramCache]: Analyzing trace with hash -827310456, now seen corresponding path program 16 times [2021-08-06 19:56:33,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:33,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521795733] [2021-08-06 19:56:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:33,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:33,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:33,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521795733] [2021-08-06 19:56:33,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521795733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:33,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679734281] [2021-08-06 19:56:33,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:56:33,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:33,453 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:33,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:56:34,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:56:34,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:34,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:56:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:34,412 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 19:56:34,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-08-06 19:56:34,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:34,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:34,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679734281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:34,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:34,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-08-06 19:56:34,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412436933] [2021-08-06 19:56:34,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:56:34,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:34,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:56:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:56:34,460 INFO L87 Difference]: Start difference. First operand 217 states and 366 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:34,641 INFO L93 Difference]: Finished difference Result 296 states and 498 transitions. [2021-08-06 19:56:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:56:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 19:56:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:34,644 INFO L225 Difference]: With dead ends: 296 [2021-08-06 19:56:34,644 INFO L226 Difference]: Without dead ends: 287 [2021-08-06 19:56:34,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:56:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-06 19:56:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 223. [2021-08-06 19:56:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.6936936936936937) internal successors, (376), 222 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 376 transitions. [2021-08-06 19:56:34,648 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 376 transitions. Word has length 26 [2021-08-06 19:56:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 376 transitions. [2021-08-06 19:56:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 376 transitions. [2021-08-06 19:56:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:56:34,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:34,648 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:34,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:34,866 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:34,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2720663, now seen corresponding path program 17 times [2021-08-06 19:56:34,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:34,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926714255] [2021-08-06 19:56:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:34,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:34,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:34,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926714255] [2021-08-06 19:56:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926714255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:34,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290094001] [2021-08-06 19:56:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:56:34,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:34,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:34,905 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:34,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:56:35,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:56:35,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:35,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:56:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:35,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:56:35,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:56:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:35,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290094001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:35,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:35,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:56:35,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490346284] [2021-08-06 19:56:35,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:56:35,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:35,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:56:35,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:56:35,641 INFO L87 Difference]: Start difference. First operand 223 states and 376 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:35,658 INFO L93 Difference]: Finished difference Result 373 states and 610 transitions. [2021-08-06 19:56:35,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:56:35,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 19:56:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:35,659 INFO L225 Difference]: With dead ends: 373 [2021-08-06 19:56:35,659 INFO L226 Difference]: Without dead ends: 373 [2021-08-06 19:56:35,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:56:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-06 19:56:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 256. [2021-08-06 19:56:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.7058823529411764) internal successors, (435), 255 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 435 transitions. [2021-08-06 19:56:35,663 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 435 transitions. Word has length 28 [2021-08-06 19:56:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:35,663 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 435 transitions. [2021-08-06 19:56:35,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 435 transitions. [2021-08-06 19:56:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:35,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:35,664 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:35,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 19:56:35,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:35,881 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:35,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1616321075, now seen corresponding path program 18 times [2021-08-06 19:56:35,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:35,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216931216] [2021-08-06 19:56:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:35,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:35,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:35,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:35,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:35,968 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:35,970 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:36,003 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:36,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:36,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:56:36,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:56:36,096 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:36,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:56:36,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216931216] [2021-08-06 19:56:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216931216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:36,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100782263] [2021-08-06 19:56:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:56:36,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:36,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:36,156 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:36,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:56:36,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:56:36,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:36,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:36,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:37,485 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:37,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:37,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:37,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:37,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100782263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:37,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:37,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-06 19:56:37,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144155009] [2021-08-06 19:56:37,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:56:37,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:56:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:56:37,534 INFO L87 Difference]: Start difference. First operand 256 states and 435 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:37,737 INFO L93 Difference]: Finished difference Result 543 states and 907 transitions. [2021-08-06 19:56:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:37,738 INFO L225 Difference]: With dead ends: 543 [2021-08-06 19:56:37,738 INFO L226 Difference]: Without dead ends: 474 [2021-08-06 19:56:37,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-06 19:56:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 316. [2021-08-06 19:56:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.6984126984126984) internal successors, (535), 315 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 535 transitions. [2021-08-06 19:56:37,744 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 535 transitions. Word has length 31 [2021-08-06 19:56:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:37,744 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 535 transitions. [2021-08-06 19:56:37,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 535 transitions. [2021-08-06 19:56:37,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:37,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:37,744 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:37,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:37,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 19:56:37,962 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1530270341, now seen corresponding path program 19 times [2021-08-06 19:56:37,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:37,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148862938] [2021-08-06 19:56:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:37,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:37,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:38,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:38,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:38,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:38,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:38,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:38,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:38,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:56:38,145 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:56:38,224 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:38,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:38,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148862938] [2021-08-06 19:56:38,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148862938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:38,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978848303] [2021-08-06 19:56:38,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:56:38,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:38,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:38,225 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:38,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:56:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:38,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:39,666 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:39,709 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:39,710 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:39,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978848303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:39,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:39,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:56:39,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841940318] [2021-08-06 19:56:39,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:56:39,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:39,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:56:39,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:39,717 INFO L87 Difference]: Start difference. First operand 316 states and 535 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:39,945 INFO L93 Difference]: Finished difference Result 635 states and 1087 transitions. [2021-08-06 19:56:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:56:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:39,947 INFO L225 Difference]: With dead ends: 635 [2021-08-06 19:56:39,947 INFO L226 Difference]: Without dead ends: 608 [2021-08-06 19:56:39,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:56:39,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-06 19:56:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 336. [2021-08-06 19:56:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.6925373134328359) internal successors, (567), 335 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 567 transitions. [2021-08-06 19:56:39,953 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 567 transitions. Word has length 31 [2021-08-06 19:56:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:39,953 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 567 transitions. [2021-08-06 19:56:39,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 567 transitions. [2021-08-06 19:56:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:39,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:39,954 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:39,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:40,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-06 19:56:40,165 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash 193466927, now seen corresponding path program 20 times [2021-08-06 19:56:40,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:40,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959813186] [2021-08-06 19:56:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:40,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:40,228 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:40,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:40,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:40,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:40,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:40,284 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:40,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:40,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959813186] [2021-08-06 19:56:40,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959813186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:40,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782382395] [2021-08-06 19:56:40,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:40,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:40,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:40,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:56:41,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:41,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:41,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:41,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:41,954 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:41,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:42,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:42,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782382395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:42,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:42,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:56:42,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679243852] [2021-08-06 19:56:42,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:56:42,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:56:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:42,010 INFO L87 Difference]: Start difference. First operand 336 states and 567 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:42,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:42,263 INFO L93 Difference]: Finished difference Result 687 states and 1175 transitions. [2021-08-06 19:56:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:56:42,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:42,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:42,265 INFO L225 Difference]: With dead ends: 687 [2021-08-06 19:56:42,265 INFO L226 Difference]: Without dead ends: 660 [2021-08-06 19:56:42,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:56:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-06 19:56:42,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 347. [2021-08-06 19:56:42,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.69364161849711) internal successors, (586), 346 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) [2021-08-06 19:56:42,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 586 transitions. [2021-08-06 19:56:42,270 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 586 transitions. Word has length 31 [2021-08-06 19:56:42,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:42,271 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 586 transitions. [2021-08-06 19:56:42,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:42,271 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 586 transitions. [2021-08-06 19:56:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:42,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:42,271 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:42,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:42,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 19:56:42,489 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 410841319, now seen corresponding path program 21 times [2021-08-06 19:56:42,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:42,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776437975] [2021-08-06 19:56:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:42,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:42,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:42,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:42,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:42,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:42,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:42,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:42,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:42,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776437975] [2021-08-06 19:56:42,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776437975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:42,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159209913] [2021-08-06 19:56:42,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:42,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:42,753 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:56:43,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:56:43,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:43,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:43,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:44,346 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:44,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:44,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:44,391 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159209913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:44,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:44,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:56:44,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518547241] [2021-08-06 19:56:44,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:56:44,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:44,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:56:44,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:44,412 INFO L87 Difference]: Start difference. First operand 347 states and 586 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:44,686 INFO L93 Difference]: Finished difference Result 633 states and 1080 transitions. [2021-08-06 19:56:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:56:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:44,688 INFO L225 Difference]: With dead ends: 633 [2021-08-06 19:56:44,688 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 19:56:44,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 379.6ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:56:44,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 19:56:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 350. [2021-08-06 19:56:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 1.6934097421203438) internal successors, (591), 349 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) [2021-08-06 19:56:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 591 transitions. [2021-08-06 19:56:44,693 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 591 transitions. Word has length 31 [2021-08-06 19:56:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:44,693 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 591 transitions. [2021-08-06 19:56:44,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:44,693 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 591 transitions. [2021-08-06 19:56:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:44,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:44,694 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:44,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 19:56:44,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:44,905 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:44,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash -589947869, now seen corresponding path program 22 times [2021-08-06 19:56:44,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:44,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007348405] [2021-08-06 19:56:44,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:44,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:44,961 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:44,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:44,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:44,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:45,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:56:45,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:56:45,075 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:45,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:56:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:56:45,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:45,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007348405] [2021-08-06 19:56:45,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007348405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:45,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728227358] [2021-08-06 19:56:45,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:56:45,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:45,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:45,127 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:45,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:56:45,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:56:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:45,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:46,731 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:46,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:46,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:46,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728227358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:46,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:46,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-08-06 19:56:46,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598880620] [2021-08-06 19:56:46,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:56:46,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:56:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:56:46,783 INFO L87 Difference]: Start difference. First operand 350 states and 591 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:46,997 INFO L93 Difference]: Finished difference Result 657 states and 1089 transitions. [2021-08-06 19:56:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:56:46,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:46,999 INFO L225 Difference]: With dead ends: 657 [2021-08-06 19:56:46,999 INFO L226 Difference]: Without dead ends: 576 [2021-08-06 19:56:46,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 377.4ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-08-06 19:56:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 379. [2021-08-06 19:56:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.693121693121693) internal successors, (640), 378 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 640 transitions. [2021-08-06 19:56:47,005 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 640 transitions. Word has length 31 [2021-08-06 19:56:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:47,005 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 640 transitions. [2021-08-06 19:56:47,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 640 transitions. [2021-08-06 19:56:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:47,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:47,006 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:47,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 19:56:47,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 19:56:47,217 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1738323749, now seen corresponding path program 23 times [2021-08-06 19:56:47,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:47,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404006420] [2021-08-06 19:56:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:47,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:47,278 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:47,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:47,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:47,325 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:47,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:56:47,412 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:56:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:56:47,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:47,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404006420] [2021-08-06 19:56:47,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404006420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:47,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543144887] [2021-08-06 19:56:47,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:56:47,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:47,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:47,483 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:47,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:56:48,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:56:48,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:48,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:49,086 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:49,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:49,131 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:49,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543144887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:49,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:49,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-06 19:56:49,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080274181] [2021-08-06 19:56:49,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:56:49,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:49,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:56:49,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:56:49,137 INFO L87 Difference]: Start difference. First operand 379 states and 640 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:49,311 INFO L93 Difference]: Finished difference Result 734 states and 1252 transitions. [2021-08-06 19:56:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:56:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:49,313 INFO L225 Difference]: With dead ends: 734 [2021-08-06 19:56:49,313 INFO L226 Difference]: Without dead ends: 707 [2021-08-06 19:56:49,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:56:49,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-06 19:56:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 377. [2021-08-06 19:56:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.6914893617021276) internal successors, (636), 376 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:49,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 636 transitions. [2021-08-06 19:56:49,319 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 636 transitions. Word has length 31 [2021-08-06 19:56:49,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:49,319 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 636 transitions. [2021-08-06 19:56:49,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 636 transitions. [2021-08-06 19:56:49,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:49,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:49,320 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:49,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:49,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 19:56:49,536 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:49,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:49,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1219840133, now seen corresponding path program 24 times [2021-08-06 19:56:49,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:49,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750384871] [2021-08-06 19:56:49,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:49,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:49,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:49,601 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:49,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:49,621 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:49,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:49,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750384871] [2021-08-06 19:56:49,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750384871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:49,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740324323] [2021-08-06 19:56:49,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:56:49,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:49,807 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:49,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:56:50,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:56:50,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:50,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:51,496 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:51,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:51,542 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:51,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740324323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:51,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:51,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-06 19:56:51,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293382688] [2021-08-06 19:56:51,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:56:51,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:51,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:56:51,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:56:51,547 INFO L87 Difference]: Start difference. First operand 377 states and 636 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:51,779 INFO L93 Difference]: Finished difference Result 758 states and 1294 transitions. [2021-08-06 19:56:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:56:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:51,781 INFO L225 Difference]: With dead ends: 758 [2021-08-06 19:56:51,781 INFO L226 Difference]: Without dead ends: 731 [2021-08-06 19:56:51,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-08-06 19:56:51,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 375. [2021-08-06 19:56:51,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.6898395721925135) internal successors, (632), 374 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 632 transitions. [2021-08-06 19:56:51,787 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 632 transitions. Word has length 31 [2021-08-06 19:56:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:51,787 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 632 transitions. [2021-08-06 19:56:51,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 632 transitions. [2021-08-06 19:56:51,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:51,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:51,788 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:51,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:52,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:52,001 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1437214525, now seen corresponding path program 25 times [2021-08-06 19:56:52,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:52,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331333677] [2021-08-06 19:56:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:52,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:52,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:52,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:52,087 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:52,089 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:52,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:52,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331333677] [2021-08-06 19:56:52,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331333677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:52,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787194525] [2021-08-06 19:56:52,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:56:52,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:52,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:52,305 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:52,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:56:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:53,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:53,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:54,095 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:54,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:54,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:54,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:54,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787194525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:54,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:54,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:56:54,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744382881] [2021-08-06 19:56:54,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:56:54,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:54,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:56:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:54,144 INFO L87 Difference]: Start difference. First operand 375 states and 632 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:54,382 INFO L93 Difference]: Finished difference Result 729 states and 1247 transitions. [2021-08-06 19:56:54,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:56:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:54,384 INFO L225 Difference]: With dead ends: 729 [2021-08-06 19:56:54,384 INFO L226 Difference]: Without dead ends: 702 [2021-08-06 19:56:54,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:56:54,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-06 19:56:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 356. [2021-08-06 19:56:54,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.6929577464788732) internal successors, (601), 355 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:54,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 601 transitions. [2021-08-06 19:56:54,390 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 601 transitions. Word has length 31 [2021-08-06 19:56:54,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:54,390 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 601 transitions. [2021-08-06 19:56:54,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:54,390 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 601 transitions. [2021-08-06 19:56:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:54,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:54,390 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:54,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:56:54,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:54,609 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:54,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:54,609 INFO L82 PathProgramCache]: Analyzing trace with hash 964355175, now seen corresponding path program 26 times [2021-08-06 19:56:54,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:54,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242104653] [2021-08-06 19:56:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:54,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:54,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:54,667 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:54,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:54,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:56:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:54,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:54,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242104653] [2021-08-06 19:56:54,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242104653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:54,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974649906] [2021-08-06 19:56:54,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:56:54,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:54,870 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:54,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:56:55,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:56:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:55,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:56,681 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:56:56,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:56:56,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:56,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974649906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:56,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:56,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:56:56,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871068305] [2021-08-06 19:56:56,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:56:56,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:56:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:56,730 INFO L87 Difference]: Start difference. First operand 356 states and 601 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:56,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:56,907 INFO L93 Difference]: Finished difference Result 748 states and 1277 transitions. [2021-08-06 19:56:56,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:56:56,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:56,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:56,909 INFO L225 Difference]: With dead ends: 748 [2021-08-06 19:56:56,909 INFO L226 Difference]: Without dead ends: 730 [2021-08-06 19:56:56,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:56:56,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-06 19:56:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 354. [2021-08-06 19:56:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.6968838526912182) internal successors, (599), 353 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 599 transitions. [2021-08-06 19:56:56,914 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 599 transitions. Word has length 31 [2021-08-06 19:56:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:56,914 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 599 transitions. [2021-08-06 19:56:56,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 599 transitions. [2021-08-06 19:56:56,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:56,914 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:56,915 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:56,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 19:56:57,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:57,129 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:56:57,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:56:57,129 INFO L82 PathProgramCache]: Analyzing trace with hash -839993113, now seen corresponding path program 27 times [2021-08-06 19:56:57,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:56:57,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814887645] [2021-08-06 19:56:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:56:57,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:56:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:56:57,182 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:57,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:56:57,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:57,239 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:56:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:57,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:56:57,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814887645] [2021-08-06 19:56:57,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814887645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:57,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304140983] [2021-08-06 19:56:57,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:56:57,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:56:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:56:57,388 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:56:57,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:56:58,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:56:58,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:56:58,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:56:58,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:56:59,476 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-06 19:56:59,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 56 [2021-08-06 19:56:59,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:59,528 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:56:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:56:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304140983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:56:59,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:56:59,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:56:59,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133315326] [2021-08-06 19:56:59,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:56:59,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:56:59,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:56:59,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:56:59,534 INFO L87 Difference]: Start difference. First operand 354 states and 599 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:56:59,875 INFO L93 Difference]: Finished difference Result 627 states and 1059 transitions. [2021-08-06 19:56:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:56:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:56:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:56:59,877 INFO L225 Difference]: With dead ends: 627 [2021-08-06 19:56:59,877 INFO L226 Difference]: Without dead ends: 618 [2021-08-06 19:56:59,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:56:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-08-06 19:56:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 385. [2021-08-06 19:56:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.6979166666666667) internal successors, (652), 384 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 652 transitions. [2021-08-06 19:56:59,883 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 652 transitions. Word has length 31 [2021-08-06 19:56:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:56:59,883 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 652 transitions. [2021-08-06 19:56:59,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:56:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 652 transitions. [2021-08-06 19:56:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:56:59,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:56:59,884 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:56:59,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:00,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:00,100 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -622618721, now seen corresponding path program 28 times [2021-08-06 19:57:00,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:00,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535270188] [2021-08-06 19:57:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:00,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:00,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:00,166 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:00,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:57:00,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:57:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:00,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535270188] [2021-08-06 19:57:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535270188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585333532] [2021-08-06 19:57:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:57:00,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:00,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:00,367 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:00,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:57:01,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:57:01,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:01,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:02,318 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:02,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:02,360 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:02,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:02,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585333532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:02,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:02,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:57:02,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757959631] [2021-08-06 19:57:02,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:57:02,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:02,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:57:02,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:02,365 INFO L87 Difference]: Start difference. First operand 385 states and 652 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:02,676 INFO L93 Difference]: Finished difference Result 669 states and 1129 transitions. [2021-08-06 19:57:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:02,678 INFO L225 Difference]: With dead ends: 669 [2021-08-06 19:57:02,678 INFO L226 Difference]: Without dead ends: 660 [2021-08-06 19:57:02,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 389.3ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:57:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-06 19:57:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 385. [2021-08-06 19:57:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.6979166666666667) internal successors, (652), 384 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 652 transitions. [2021-08-06 19:57:02,683 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 652 transitions. Word has length 31 [2021-08-06 19:57:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:02,683 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 652 transitions. [2021-08-06 19:57:02,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 652 transitions. [2021-08-06 19:57:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:02,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:02,684 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:02,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 19:57:02,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-06 19:57:02,893 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:02,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:02,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1623407909, now seen corresponding path program 29 times [2021-08-06 19:57:02,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:02,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718721012] [2021-08-06 19:57:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:02,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:02,939 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:02,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:03,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:03,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:03,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:03,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:03,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:57:03,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:03,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718721012] [2021-08-06 19:57:03,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718721012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:03,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508693638] [2021-08-06 19:57:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:57:03,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:03,126 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:57:04,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:57:04,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:04,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:04,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:05,194 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-08-06 19:57:05,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 85 treesize of output 56 [2021-08-06 19:57:05,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:05,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:05,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508693638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:05,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:05,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-06 19:57:05,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837064848] [2021-08-06 19:57:05,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:57:05,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:05,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:57:05,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:57:05,249 INFO L87 Difference]: Start difference. First operand 385 states and 652 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:05,705 INFO L93 Difference]: Finished difference Result 779 states and 1287 transitions. [2021-08-06 19:57:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:57:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:05,707 INFO L225 Difference]: With dead ends: 779 [2021-08-06 19:57:05,707 INFO L226 Difference]: Without dead ends: 686 [2021-08-06 19:57:05,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:57:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-06 19:57:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 421. [2021-08-06 19:57:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.6952380952380952) internal successors, (712), 420 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 712 transitions. [2021-08-06 19:57:05,712 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 712 transitions. Word has length 31 [2021-08-06 19:57:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:05,712 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 712 transitions. [2021-08-06 19:57:05,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 712 transitions. [2021-08-06 19:57:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:05,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:05,714 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:05,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:05,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:05,933 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:05,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:05,933 INFO L82 PathProgramCache]: Analyzing trace with hash 186380093, now seen corresponding path program 30 times [2021-08-06 19:57:05,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:05,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495535067] [2021-08-06 19:57:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:05,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:05,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:05,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:06,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:06,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495535067] [2021-08-06 19:57:06,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495535067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:06,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357846715] [2021-08-06 19:57:06,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:57:06,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:06,194 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:06,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:57:07,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:57:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:07,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:08,237 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:08,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:08,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:08,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:08,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357846715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:08,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:08,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-06 19:57:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314376237] [2021-08-06 19:57:08,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:08,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:08,289 INFO L87 Difference]: Start difference. First operand 421 states and 712 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:08,547 INFO L93 Difference]: Finished difference Result 892 states and 1514 transitions. [2021-08-06 19:57:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:57:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:08,549 INFO L225 Difference]: With dead ends: 892 [2021-08-06 19:57:08,549 INFO L226 Difference]: Without dead ends: 865 [2021-08-06 19:57:08,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-08-06 19:57:08,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 443. [2021-08-06 19:57:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.6968325791855203) internal successors, (750), 442 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 750 transitions. [2021-08-06 19:57:08,555 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 750 transitions. Word has length 31 [2021-08-06 19:57:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:08,555 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 750 transitions. [2021-08-06 19:57:08,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 750 transitions. [2021-08-06 19:57:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:08,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:08,556 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:08,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:08,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:08,775 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:08,776 INFO L82 PathProgramCache]: Analyzing trace with hash 403754485, now seen corresponding path program 31 times [2021-08-06 19:57:08,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:08,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390256458] [2021-08-06 19:57:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:08,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:08,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:08,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:09,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:09,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390256458] [2021-08-06 19:57:09,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390256458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:09,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295341327] [2021-08-06 19:57:09,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:57:09,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:09,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:09,033 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:09,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:57:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:10,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:11,151 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:11,195 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:11,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295341327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:11,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:11,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:57:11,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015719554] [2021-08-06 19:57:11,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:57:11,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:11,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:57:11,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:11,213 INFO L87 Difference]: Start difference. First operand 443 states and 750 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:11,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:11,465 INFO L93 Difference]: Finished difference Result 864 states and 1468 transitions. [2021-08-06 19:57:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:57:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:11,467 INFO L225 Difference]: With dead ends: 864 [2021-08-06 19:57:11,467 INFO L226 Difference]: Without dead ends: 837 [2021-08-06 19:57:11,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:57:11,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-08-06 19:57:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 441. [2021-08-06 19:57:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 1.6954545454545455) internal successors, (746), 440 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 746 transitions. [2021-08-06 19:57:11,473 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 746 transitions. Word has length 31 [2021-08-06 19:57:11,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:11,473 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 746 transitions. [2021-08-06 19:57:11,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:11,473 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 746 transitions. [2021-08-06 19:57:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:11,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:11,474 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:11,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 19:57:11,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 19:57:11,689 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:11,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:11,689 INFO L82 PathProgramCache]: Analyzing trace with hash -69104865, now seen corresponding path program 32 times [2021-08-06 19:57:11,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:11,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947890155] [2021-08-06 19:57:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:11,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:11,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:11,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:11,947 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:11,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:11,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947890155] [2021-08-06 19:57:11,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947890155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:11,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715758316] [2021-08-06 19:57:11,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:57:11,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:11,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:11,948 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:11,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:57:13,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:57:13,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:13,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:13,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:14,094 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:14,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:14,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:14,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:14,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715758316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:14,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:14,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:57:14,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174227535] [2021-08-06 19:57:14,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:57:14,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:14,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:57:14,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:14,145 INFO L87 Difference]: Start difference. First operand 441 states and 746 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:14,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:14,407 INFO L93 Difference]: Finished difference Result 843 states and 1436 transitions. [2021-08-06 19:57:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:57:14,407 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:14,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:14,409 INFO L225 Difference]: With dead ends: 843 [2021-08-06 19:57:14,409 INFO L226 Difference]: Without dead ends: 825 [2021-08-06 19:57:14,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:57:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-08-06 19:57:14,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 439. [2021-08-06 19:57:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.6940639269406392) internal successors, (742), 438 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 742 transitions. [2021-08-06 19:57:14,415 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 742 transitions. Word has length 31 [2021-08-06 19:57:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:14,415 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 742 transitions. [2021-08-06 19:57:14,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 742 transitions. [2021-08-06 19:57:14,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:14,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:14,418 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:14,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 19:57:14,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:57:14,626 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash 463328099, now seen corresponding path program 33 times [2021-08-06 19:57:14,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:14,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050276141] [2021-08-06 19:57:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:14,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:14,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:14,677 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:14,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:14,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:14,819 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:14,821 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:57:14,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:14,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050276141] [2021-08-06 19:57:14,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050276141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:14,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564220254] [2021-08-06 19:57:14,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:57:14,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:14,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:14,886 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:14,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:57:16,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:57:16,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:16,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:17,098 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:17,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:17,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:17,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:17,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564220254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:17,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:17,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-06 19:57:17,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835619639] [2021-08-06 19:57:17,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:57:17,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:57:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:57:17,147 INFO L87 Difference]: Start difference. First operand 439 states and 742 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:17,297 INFO L93 Difference]: Finished difference Result 814 states and 1384 transitions. [2021-08-06 19:57:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:57:17,298 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:17,300 INFO L225 Difference]: With dead ends: 814 [2021-08-06 19:57:17,300 INFO L226 Difference]: Without dead ends: 769 [2021-08-06 19:57:17,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 350.7ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:57:17,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-08-06 19:57:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 473. [2021-08-06 19:57:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 1.6991525423728813) internal successors, (802), 472 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 802 transitions. [2021-08-06 19:57:17,305 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 802 transitions. Word has length 31 [2021-08-06 19:57:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:17,306 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 802 transitions. [2021-08-06 19:57:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 802 transitions. [2021-08-06 19:57:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:17,306 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:17,306 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:17,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:17,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 19:57:17,521 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2021851195, now seen corresponding path program 34 times [2021-08-06 19:57:17,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:17,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844216775] [2021-08-06 19:57:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:17,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:17,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:17,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:17,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:17,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844216775] [2021-08-06 19:57:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844216775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:17,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366686593] [2021-08-06 19:57:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:57:17,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:17,769 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:17,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:57:19,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:57:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:19,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:20,020 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:20,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:20,064 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:20,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:20,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366686593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:20,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:20,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-08-06 19:57:20,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418801585] [2021-08-06 19:57:20,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:20,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:20,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:20,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:20,070 INFO L87 Difference]: Start difference. First operand 473 states and 802 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:20,330 INFO L93 Difference]: Finished difference Result 888 states and 1512 transitions. [2021-08-06 19:57:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:20,330 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:20,332 INFO L225 Difference]: With dead ends: 888 [2021-08-06 19:57:20,332 INFO L226 Difference]: Without dead ends: 861 [2021-08-06 19:57:20,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:20,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-08-06 19:57:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 463. [2021-08-06 19:57:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 1.696969696969697) internal successors, (784), 462 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 784 transitions. [2021-08-06 19:57:20,338 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 784 transitions. Word has length 31 [2021-08-06 19:57:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:20,338 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 784 transitions. [2021-08-06 19:57:20,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:20,338 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 784 transitions. [2021-08-06 19:57:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:20,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:20,339 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:20,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 19:57:20,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:57:20,547 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:20,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1804476803, now seen corresponding path program 35 times [2021-08-06 19:57:20,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:20,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352517274] [2021-08-06 19:57:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:20,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:20,602 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:20,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:20,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352517274] [2021-08-06 19:57:20,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352517274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:20,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520186657] [2021-08-06 19:57:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:57:20,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:20,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:20,825 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:57:22,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:57:22,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:22,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 19:57:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:23,125 INFO L354 Elim1Store]: treesize reduction 296, result has 4.2 percent of original size [2021-08-06 19:57:23,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 62 treesize of output 46 [2021-08-06 19:57:23,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:23,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:23,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520186657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:23,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:23,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-06 19:57:23,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561636686] [2021-08-06 19:57:23,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:57:23,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:23,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:57:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:57:23,182 INFO L87 Difference]: Start difference. First operand 463 states and 784 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:24,091 INFO L93 Difference]: Finished difference Result 975 states and 1641 transitions. [2021-08-06 19:57:24,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:57:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:24,094 INFO L225 Difference]: With dead ends: 975 [2021-08-06 19:57:24,094 INFO L226 Difference]: Without dead ends: 912 [2021-08-06 19:57:24,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 904.0ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:57:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-06 19:57:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 477. [2021-08-06 19:57:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.6932773109243697) internal successors, (806), 476 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 806 transitions. [2021-08-06 19:57:24,100 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 806 transitions. Word has length 31 [2021-08-06 19:57:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:24,100 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 806 transitions. [2021-08-06 19:57:24,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 806 transitions. [2021-08-06 19:57:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:24,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:24,101 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:24,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:24,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:24,322 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2017631143, now seen corresponding path program 36 times [2021-08-06 19:57:24,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:24,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272380114] [2021-08-06 19:57:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:24,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:24,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:24,370 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:24,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:24,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272380114] [2021-08-06 19:57:24,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272380114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:24,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411598638] [2021-08-06 19:57:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:57:24,596 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:24,597 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:24,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:57:26,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:57:26,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:26,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:26,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:26,981 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:27,026 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:27,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:27,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411598638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:27,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:27,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:57:27,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493211687] [2021-08-06 19:57:27,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:57:27,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:27,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:57:27,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:27,032 INFO L87 Difference]: Start difference. First operand 477 states and 806 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:27,260 INFO L93 Difference]: Finished difference Result 787 states and 1339 transitions. [2021-08-06 19:57:27,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:27,260 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:27,262 INFO L225 Difference]: With dead ends: 787 [2021-08-06 19:57:27,262 INFO L226 Difference]: Without dead ends: 778 [2021-08-06 19:57:27,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 371.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:27,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-08-06 19:57:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 477. [2021-08-06 19:57:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.6932773109243697) internal successors, (806), 476 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 806 transitions. [2021-08-06 19:57:27,268 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 806 transitions. Word has length 31 [2021-08-06 19:57:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:27,268 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 806 transitions. [2021-08-06 19:57:27,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 806 transitions. [2021-08-06 19:57:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:27,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:27,269 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:27,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 19:57:27,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 19:57:27,490 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash 461024351, now seen corresponding path program 37 times [2021-08-06 19:57:27,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:27,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525107074] [2021-08-06 19:57:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:27,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:27,537 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:27,539 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:57:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:27,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:27,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525107074] [2021-08-06 19:57:27,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525107074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:27,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579881700] [2021-08-06 19:57:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:57:27,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:27,785 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:27,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:57:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:29,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:30,296 INFO L354 Elim1Store]: treesize reduction 219, result has 4.4 percent of original size [2021-08-06 19:57:30,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 47 [2021-08-06 19:57:30,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:30,349 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:30,354 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:30,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579881700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:30,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:30,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-06 19:57:30,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140655166] [2021-08-06 19:57:30,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:57:30,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:57:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:30,355 INFO L87 Difference]: Start difference. First operand 477 states and 806 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:30,560 INFO L93 Difference]: Finished difference Result 794 states and 1352 transitions. [2021-08-06 19:57:30,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:30,560 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:30,562 INFO L225 Difference]: With dead ends: 794 [2021-08-06 19:57:30,562 INFO L226 Difference]: Without dead ends: 785 [2021-08-06 19:57:30,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:30,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-08-06 19:57:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 486. [2021-08-06 19:57:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.6927835051546392) internal successors, (821), 485 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 821 transitions. [2021-08-06 19:57:30,568 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 821 transitions. Word has length 31 [2021-08-06 19:57:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:30,568 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 821 transitions. [2021-08-06 19:57:30,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 821 transitions. [2021-08-06 19:57:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:30,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:30,569 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:30,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 19:57:30,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 19:57:30,770 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1326284719, now seen corresponding path program 38 times [2021-08-06 19:57:30,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:30,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830110527] [2021-08-06 19:57:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:30,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:30,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:30,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:57:30,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:57:30,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:57:30,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:57:30,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:30,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:31,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:31,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830110527] [2021-08-06 19:57:31,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830110527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:31,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648936449] [2021-08-06 19:57:31,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:57:31,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:31,075 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:57:32,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:57:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:32,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:33,463 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:33,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:33,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:33,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:33,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648936449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:33,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:33,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:57:33,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592012166] [2021-08-06 19:57:33,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:33,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:33,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:33,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:33,512 INFO L87 Difference]: Start difference. First operand 486 states and 821 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:33,805 INFO L93 Difference]: Finished difference Result 1017 states and 1699 transitions. [2021-08-06 19:57:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:57:33,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:33,808 INFO L225 Difference]: With dead ends: 1017 [2021-08-06 19:57:33,808 INFO L226 Difference]: Without dead ends: 936 [2021-08-06 19:57:33,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:57:33,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-08-06 19:57:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 564. [2021-08-06 19:57:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.6856127886323269) internal successors, (949), 563 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 949 transitions. [2021-08-06 19:57:33,814 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 949 transitions. Word has length 31 [2021-08-06 19:57:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:33,815 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 949 transitions. [2021-08-06 19:57:33,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 949 transitions. [2021-08-06 19:57:33,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:33,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:33,815 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:33,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 19:57:34,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-06 19:57:34,019 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:34,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:34,019 INFO L82 PathProgramCache]: Analyzing trace with hash -941520183, now seen corresponding path program 39 times [2021-08-06 19:57:34,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:34,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823724635] [2021-08-06 19:57:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:34,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:34,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:57:34,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 57.1 percent of original size [2021-08-06 19:57:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:34,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:34,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823724635] [2021-08-06 19:57:34,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823724635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:34,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908464520] [2021-08-06 19:57:34,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:57:34,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:34,270 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:34,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:57:36,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:57:36,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:36,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 19:57:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:36,793 INFO L354 Elim1Store]: treesize reduction 164, result has 4.1 percent of original size [2021-08-06 19:57:36,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 84 treesize of output 48 [2021-08-06 19:57:36,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:36,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:36,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908464520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:36,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:36,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:57:36,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254748584] [2021-08-06 19:57:36,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:36,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:36,844 INFO L87 Difference]: Start difference. First operand 564 states and 949 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:37,112 INFO L93 Difference]: Finished difference Result 994 states and 1662 transitions. [2021-08-06 19:57:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:57:37,113 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:37,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:37,115 INFO L225 Difference]: With dead ends: 994 [2021-08-06 19:57:37,115 INFO L226 Difference]: Without dead ends: 931 [2021-08-06 19:57:37,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:57:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-06 19:57:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 620. [2021-08-06 19:57:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 1.6882067851373181) internal successors, (1045), 619 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1045 transitions. [2021-08-06 19:57:37,123 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1045 transitions. Word has length 31 [2021-08-06 19:57:37,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:37,123 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1045 transitions. [2021-08-06 19:57:37,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:37,123 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1045 transitions. [2021-08-06 19:57:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:37,124 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:37,124 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:37,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:37,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:37,324 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1942309371, now seen corresponding path program 40 times [2021-08-06 19:57:37,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:37,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671625305] [2021-08-06 19:57:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:37,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:37,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:37,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:37,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:37,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:37,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:37,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671625305] [2021-08-06 19:57:37,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671625305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:37,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878539582] [2021-08-06 19:57:37,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:57:37,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:37,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:37,602 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:37,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:57:39,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:57:39,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:39,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:40,136 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:40,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:40,180 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:40,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878539582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:40,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:40,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-06 19:57:40,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842807068] [2021-08-06 19:57:40,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:57:40,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:57:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:57:40,185 INFO L87 Difference]: Start difference. First operand 620 states and 1045 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:40,482 INFO L93 Difference]: Finished difference Result 1065 states and 1771 transitions. [2021-08-06 19:57:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:57:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:40,485 INFO L225 Difference]: With dead ends: 1065 [2021-08-06 19:57:40,485 INFO L226 Difference]: Without dead ends: 966 [2021-08-06 19:57:40,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:57:40,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-08-06 19:57:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 549. [2021-08-06 19:57:40,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.697080291970803) internal successors, (930), 548 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 930 transitions. [2021-08-06 19:57:40,491 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 930 transitions. Word has length 31 [2021-08-06 19:57:40,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:40,491 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 930 transitions. [2021-08-06 19:57:40,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:40,491 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 930 transitions. [2021-08-06 19:57:40,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:40,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:40,492 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:40,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:40,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:40,714 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash 84853023, now seen corresponding path program 41 times [2021-08-06 19:57:40,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:40,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992812132] [2021-08-06 19:57:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:40,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:40,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:40,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992812132] [2021-08-06 19:57:40,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992812132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:40,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372598376] [2021-08-06 19:57:40,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:57:40,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:40,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:40,996 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:40,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:57:42,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:57:42,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:42,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:43,627 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:43,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:43,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:43,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:43,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372598376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:43,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:43,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:57:43,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205868171] [2021-08-06 19:57:43,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:43,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:43,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:43,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:43,676 INFO L87 Difference]: Start difference. First operand 549 states and 930 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:43,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:43,950 INFO L93 Difference]: Finished difference Result 1055 states and 1797 transitions. [2021-08-06 19:57:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:57:43,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:43,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:43,953 INFO L225 Difference]: With dead ends: 1055 [2021-08-06 19:57:43,953 INFO L226 Difference]: Without dead ends: 1028 [2021-08-06 19:57:43,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:43,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-08-06 19:57:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 573. [2021-08-06 19:57:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 1.6993006993006994) internal successors, (972), 572 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 972 transitions. [2021-08-06 19:57:43,959 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 972 transitions. Word has length 31 [2021-08-06 19:57:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:43,959 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 972 transitions. [2021-08-06 19:57:43,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:43,960 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 972 transitions. [2021-08-06 19:57:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:43,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:43,960 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:43,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 19:57:44,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 19:57:44,161 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:44,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:44,161 INFO L82 PathProgramCache]: Analyzing trace with hash -388006327, now seen corresponding path program 42 times [2021-08-06 19:57:44,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:44,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093221232] [2021-08-06 19:57:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:44,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:44,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:44,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093221232] [2021-08-06 19:57:44,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093221232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:44,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545413209] [2021-08-06 19:57:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:57:44,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:44,447 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:44,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:57:46,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:57:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:46,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:47,134 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:47,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:47,190 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:47,190 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:47,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545413209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:47,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:47,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:57:47,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488567614] [2021-08-06 19:57:47,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:47,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:47,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:47,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:47,195 INFO L87 Difference]: Start difference. First operand 573 states and 972 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:47,442 INFO L93 Difference]: Finished difference Result 957 states and 1636 transitions. [2021-08-06 19:57:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:57:47,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:47,443 INFO L225 Difference]: With dead ends: 957 [2021-08-06 19:57:47,443 INFO L226 Difference]: Without dead ends: 939 [2021-08-06 19:57:47,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:57:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-06 19:57:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 576. [2021-08-06 19:57:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.6991304347826086) internal successors, (977), 575 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 977 transitions. [2021-08-06 19:57:47,450 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 977 transitions. Word has length 31 [2021-08-06 19:57:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:47,450 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 977 transitions. [2021-08-06 19:57:47,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 977 transitions. [2021-08-06 19:57:47,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:47,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:47,451 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:47,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 19:57:47,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 19:57:47,651 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash 144426637, now seen corresponding path program 43 times [2021-08-06 19:57:47,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:47,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510871323] [2021-08-06 19:57:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:47,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:47,824 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:47,826 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:57:47,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:47,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:57:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:47,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:47,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510871323] [2021-08-06 19:57:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510871323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:47,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94882654] [2021-08-06 19:57:47,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:57:47,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:47,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:47,919 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:47,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:57:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:49,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:50,611 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:50,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:50,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:50,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:50,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94882654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:50,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:50,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-06 19:57:50,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668929069] [2021-08-06 19:57:50,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:57:50,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:57:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:57:50,674 INFO L87 Difference]: Start difference. First operand 576 states and 977 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:50,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:50,893 INFO L93 Difference]: Finished difference Result 1119 states and 1903 transitions. [2021-08-06 19:57:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:57:50,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:50,895 INFO L225 Difference]: With dead ends: 1119 [2021-08-06 19:57:50,895 INFO L226 Difference]: Without dead ends: 1068 [2021-08-06 19:57:50,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:57:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-08-06 19:57:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 637. [2021-08-06 19:57:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.7075471698113207) internal successors, (1086), 636 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1086 transitions. [2021-08-06 19:57:50,902 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1086 transitions. Word has length 31 [2021-08-06 19:57:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:50,902 INFO L470 AbstractCegarLoop]: Abstraction has 637 states and 1086 transitions. [2021-08-06 19:57:50,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1086 transitions. [2021-08-06 19:57:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:50,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:50,903 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:50,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:57:51,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 19:57:51,117 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2123378265, now seen corresponding path program 44 times [2021-08-06 19:57:51,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:51,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003129410] [2021-08-06 19:57:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:51,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:51,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:51,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003129410] [2021-08-06 19:57:51,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003129410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:51,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511501934] [2021-08-06 19:57:51,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:57:51,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:51,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:51,405 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:51,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:57:53,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:57:53,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:53,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:54,195 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:54,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:54,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:54,240 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:54,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511501934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:54,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:54,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:57:54,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123518875] [2021-08-06 19:57:54,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:54,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:54,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:54,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:54,245 INFO L87 Difference]: Start difference. First operand 637 states and 1086 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:54,535 INFO L93 Difference]: Finished difference Result 1110 states and 1900 transitions. [2021-08-06 19:57:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:54,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:54,536 INFO L225 Difference]: With dead ends: 1110 [2021-08-06 19:57:54,537 INFO L226 Difference]: Without dead ends: 1083 [2021-08-06 19:57:54,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-08-06 19:57:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 648. [2021-08-06 19:57:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7109737248840804) internal successors, (1107), 647 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1107 transitions. [2021-08-06 19:57:54,544 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1107 transitions. Word has length 31 [2021-08-06 19:57:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:54,544 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1107 transitions. [2021-08-06 19:57:54,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1107 transitions. [2021-08-06 19:57:54,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:54,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:54,545 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:54,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 19:57:54,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:54,745 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:54,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:54,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1698729681, now seen corresponding path program 45 times [2021-08-06 19:57:54,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:54,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881056145] [2021-08-06 19:57:54,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:54,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:55,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:55,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881056145] [2021-08-06 19:57:55,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881056145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:55,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471447234] [2021-08-06 19:57:55,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:57:55,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:55,036 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:55,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:57:57,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:57:57,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:57:57,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:57:57,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:57:57,889 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:57:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:57:57,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:57,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:57:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:57,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471447234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:57,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:57:57,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:57:57,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431447230] [2021-08-06 19:57:57,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:57:57,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:57:57,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:57:57,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:57,938 INFO L87 Difference]: Start difference. First operand 648 states and 1107 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:57:58,157 INFO L93 Difference]: Finished difference Result 924 states and 1582 transitions. [2021-08-06 19:57:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:57:58,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:57:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:57:58,166 INFO L225 Difference]: With dead ends: 924 [2021-08-06 19:57:58,166 INFO L226 Difference]: Without dead ends: 915 [2021-08-06 19:57:58,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:57:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-08-06 19:57:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 648. [2021-08-06 19:57:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7109737248840804) internal successors, (1107), 647 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1107 transitions. [2021-08-06 19:57:58,173 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1107 transitions. Word has length 31 [2021-08-06 19:57:58,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:57:58,173 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1107 transitions. [2021-08-06 19:57:58,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:57:58,173 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1107 transitions. [2021-08-06 19:57:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:57:58,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:57:58,174 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:57:58,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 19:57:58,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:58,374 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:57:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:57:58,375 INFO L82 PathProgramCache]: Analyzing trace with hash 142122889, now seen corresponding path program 46 times [2021-08-06 19:57:58,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:57:58,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108262007] [2021-08-06 19:57:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:57:58,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:57:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:57:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:57:58,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:57:58,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108262007] [2021-08-06 19:57:58,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108262007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:57:58,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320855643] [2021-08-06 19:57:58,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:57:58,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:57:58,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:57:58,665 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:57:58,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:58:00,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:58:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:00,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:00,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:01,692 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:58:01,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:58:01,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:01,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:01,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320855643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:01,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:01,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:58:01,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723313673] [2021-08-06 19:58:01,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:58:01,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:58:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:58:01,744 INFO L87 Difference]: Start difference. First operand 648 states and 1107 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:02,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:02,038 INFO L93 Difference]: Finished difference Result 931 states and 1595 transitions. [2021-08-06 19:58:02,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:02,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:02,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:02,040 INFO L225 Difference]: With dead ends: 931 [2021-08-06 19:58:02,040 INFO L226 Difference]: Without dead ends: 922 [2021-08-06 19:58:02,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:58:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-08-06 19:58:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 648. [2021-08-06 19:58:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7109737248840804) internal successors, (1107), 647 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1107 transitions. [2021-08-06 19:58:02,046 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1107 transitions. Word has length 31 [2021-08-06 19:58:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:02,046 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1107 transitions. [2021-08-06 19:58:02,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1107 transitions. [2021-08-06 19:58:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:58:02,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:02,047 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:02,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:02,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:02,252 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:02,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1353400477, now seen corresponding path program 47 times [2021-08-06 19:58:02,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:02,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269609758] [2021-08-06 19:58:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:02,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:02,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:58:02,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:58:02,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:58:02,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 64.5 percent of original size [2021-08-06 19:58:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:02,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:02,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269609758] [2021-08-06 19:58:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269609758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:02,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102557658] [2021-08-06 19:58:02,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:58:02,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:02,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:02,508 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:02,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:58:04,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:58:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:04,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:05,404 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-06 19:58:05,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-06 19:58:05,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:05,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:05,452 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:05,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102557658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:05,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:05,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-06 19:58:05,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173751412] [2021-08-06 19:58:05,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:58:05,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:05,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:58:05,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:58:05,453 INFO L87 Difference]: Start difference. First operand 648 states and 1107 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:05,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:05,620 INFO L93 Difference]: Finished difference Result 978 states and 1664 transitions. [2021-08-06 19:58:05,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:05,620 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:05,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:05,621 INFO L225 Difference]: With dead ends: 978 [2021-08-06 19:58:05,621 INFO L226 Difference]: Without dead ends: 921 [2021-08-06 19:58:05,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 305.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:58:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-08-06 19:58:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 668. [2021-08-06 19:58:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 1.719640179910045) internal successors, (1147), 667 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:05,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1147 transitions. [2021-08-06 19:58:05,628 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1147 transitions. Word has length 31 [2021-08-06 19:58:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1147 transitions. [2021-08-06 19:58:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1147 transitions. [2021-08-06 19:58:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:58:05,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:05,629 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:05,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:58:05,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 19:58:05,830 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:05,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1793190939, now seen corresponding path program 48 times [2021-08-06 19:58:05,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:05,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837825730] [2021-08-06 19:58:05,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:05,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:06,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:58:06,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 67.6 percent of original size [2021-08-06 19:58:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:06,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:06,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837825730] [2021-08-06 19:58:06,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837825730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:06,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370768950] [2021-08-06 19:58:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:58:06,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:06,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:06,141 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:06,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:58:08,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:58:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:08,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:09,096 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-06 19:58:09,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-06 19:58:09,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:09,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:09,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370768950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:09,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:09,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-06 19:58:09,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475906976] [2021-08-06 19:58:09,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:58:09,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:58:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:58:09,145 INFO L87 Difference]: Start difference. First operand 668 states and 1147 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:09,371 INFO L93 Difference]: Finished difference Result 1134 states and 1956 transitions. [2021-08-06 19:58:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:09,372 INFO L225 Difference]: With dead ends: 1134 [2021-08-06 19:58:09,372 INFO L226 Difference]: Without dead ends: 1107 [2021-08-06 19:58:09,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:58:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-08-06 19:58:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 664. [2021-08-06 19:58:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.7179487179487178) internal successors, (1139), 663 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:09,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1139 transitions. [2021-08-06 19:58:09,379 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1139 transitions. Word has length 31 [2021-08-06 19:58:09,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:09,380 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1139 transitions. [2021-08-06 19:58:09,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:09,380 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1139 transitions. [2021-08-06 19:58:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:58:09,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:09,380 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:09,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 19:58:09,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 19:58:09,581 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash 673761917, now seen corresponding path program 49 times [2021-08-06 19:58:09,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:09,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544063159] [2021-08-06 19:58:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:09,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:09,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:09,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544063159] [2021-08-06 19:58:09,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544063159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:09,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476294443] [2021-08-06 19:58:09,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:58:09,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:09,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:09,872 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:09,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:58:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:12,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:12,907 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-06 19:58:12,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-06 19:58:12,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:12,963 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:12,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476294443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:12,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:12,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-06 19:58:12,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040306993] [2021-08-06 19:58:12,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:58:12,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:12,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:58:12,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:12,967 INFO L87 Difference]: Start difference. First operand 664 states and 1139 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:13,203 INFO L93 Difference]: Finished difference Result 1114 states and 1906 transitions. [2021-08-06 19:58:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:13,203 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:13,205 INFO L225 Difference]: With dead ends: 1114 [2021-08-06 19:58:13,205 INFO L226 Difference]: Without dead ends: 1087 [2021-08-06 19:58:13,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-08-06 19:58:13,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 654. [2021-08-06 19:58:13,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.7166921898928025) internal successors, (1121), 653 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:13,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1121 transitions. [2021-08-06 19:58:13,212 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1121 transitions. Word has length 31 [2021-08-06 19:58:13,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:13,212 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1121 transitions. [2021-08-06 19:58:13,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1121 transitions. [2021-08-06 19:58:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:58:13,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:13,213 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:13,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:13,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:13,426 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 200902567, now seen corresponding path program 50 times [2021-08-06 19:58:13,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:13,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116540091] [2021-08-06 19:58:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:13,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:13,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:13,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116540091] [2021-08-06 19:58:13,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116540091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:13,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233539693] [2021-08-06 19:58:13,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:58:13,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:13,713 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:13,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:58:16,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:58:16,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:16,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:16,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:16,789 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-06 19:58:16,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-06 19:58:16,833 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:16,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:16,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233539693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:16,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:16,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-06 19:58:16,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475564254] [2021-08-06 19:58:16,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:58:16,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:58:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:16,838 INFO L87 Difference]: Start difference. First operand 654 states and 1121 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:17,115 INFO L93 Difference]: Finished difference Result 952 states and 1636 transitions. [2021-08-06 19:58:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:17,117 INFO L225 Difference]: With dead ends: 952 [2021-08-06 19:58:17,117 INFO L226 Difference]: Without dead ends: 943 [2021-08-06 19:58:17,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-06 19:58:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 653. [2021-08-06 19:58:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 1.7177914110429449) internal successors, (1120), 652 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1120 transitions. [2021-08-06 19:58:17,124 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1120 transitions. Word has length 31 [2021-08-06 19:58:17,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:17,124 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1120 transitions. [2021-08-06 19:58:17,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1120 transitions. [2021-08-06 19:58:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:58:17,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:17,125 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:17,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 19:58:17,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 19:58:17,325 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1355704225, now seen corresponding path program 51 times [2021-08-06 19:58:17,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:17,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990559985] [2021-08-06 19:58:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:17,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:17,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:17,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990559985] [2021-08-06 19:58:17,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990559985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:17,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320700379] [2021-08-06 19:58:17,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:58:17,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:17,627 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:17,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:58:20,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:58:20,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:20,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:20,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:20,754 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-06 19:58:20,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 41 [2021-08-06 19:58:20,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:20,806 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:20,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320700379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:20,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:20,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-06 19:58:20,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563496866] [2021-08-06 19:58:20,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:58:20,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:58:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:20,811 INFO L87 Difference]: Start difference. First operand 653 states and 1120 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:20,980 INFO L93 Difference]: Finished difference Result 943 states and 1619 transitions. [2021-08-06 19:58:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:58:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:20,982 INFO L225 Difference]: With dead ends: 943 [2021-08-06 19:58:20,982 INFO L226 Difference]: Without dead ends: 934 [2021-08-06 19:58:20,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-08-06 19:58:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 648. [2021-08-06 19:58:20,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.7171561051004636) internal successors, (1111), 647 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:20,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1111 transitions. [2021-08-06 19:58:20,988 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1111 transitions. Word has length 31 [2021-08-06 19:58:20,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:20,989 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1111 transitions. [2021-08-06 19:58:20,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1111 transitions. [2021-08-06 19:58:20,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:58:20,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:20,989 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:21,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 19:58:21,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 19:58:21,190 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:21,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:21,190 INFO L82 PathProgramCache]: Analyzing trace with hash -507006199, now seen corresponding path program 52 times [2021-08-06 19:58:21,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:21,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010023793] [2021-08-06 19:58:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:21,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:21,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:21,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010023793] [2021-08-06 19:58:21,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010023793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:21,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137237406] [2021-08-06 19:58:21,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:58:21,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:21,487 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:21,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:58:23,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:58:23,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:23,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:23,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:24,621 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 19:58:24,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-08-06 19:58:24,664 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:24,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:24,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137237406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:24,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:24,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-06 19:58:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498671556] [2021-08-06 19:58:24,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:58:24,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:58:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:58:24,674 INFO L87 Difference]: Start difference. First operand 648 states and 1111 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:24,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:24,914 INFO L93 Difference]: Finished difference Result 855 states and 1461 transitions. [2021-08-06 19:58:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:58:24,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:58:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:24,916 INFO L225 Difference]: With dead ends: 855 [2021-08-06 19:58:24,916 INFO L226 Difference]: Without dead ends: 846 [2021-08-06 19:58:24,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:58:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-08-06 19:58:24,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 654. [2021-08-06 19:58:24,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 1.7166921898928025) internal successors, (1121), 653 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1121 transitions. [2021-08-06 19:58:24,922 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1121 transitions. Word has length 31 [2021-08-06 19:58:24,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:24,922 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1121 transitions. [2021-08-06 19:58:24,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1121 transitions. [2021-08-06 19:58:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:58:24,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:24,923 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:24,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:25,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:25,125 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1427974998, now seen corresponding path program 53 times [2021-08-06 19:58:25,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:25,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413256242] [2021-08-06 19:58:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:25,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:25,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:25,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413256242] [2021-08-06 19:58:25,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413256242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:25,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173132912] [2021-08-06 19:58:25,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:58:25,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:25,181 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:25,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:58:27,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:58:27,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:58:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:27,825 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:58:27,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 19:58:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:27,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173132912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:27,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:27,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:58:27,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610190211] [2021-08-06 19:58:27,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:58:27,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:58:27,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:58:27,849 INFO L87 Difference]: Start difference. First operand 654 states and 1121 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:27,870 INFO L93 Difference]: Finished difference Result 877 states and 1473 transitions. [2021-08-06 19:58:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:58:27,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-06 19:58:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:27,872 INFO L225 Difference]: With dead ends: 877 [2021-08-06 19:58:27,872 INFO L226 Difference]: Without dead ends: 877 [2021-08-06 19:58:27,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:58:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-08-06 19:58:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 705. [2021-08-06 19:58:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 1.71875) internal successors, (1210), 704 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 1210 transitions. [2021-08-06 19:58:27,878 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 1210 transitions. Word has length 33 [2021-08-06 19:58:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:27,878 INFO L470 AbstractCegarLoop]: Abstraction has 705 states and 1210 transitions. [2021-08-06 19:58:27,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 1210 transitions. [2021-08-06 19:58:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 19:58:27,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:27,879 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:27,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:28,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:28,103 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1558742331, now seen corresponding path program 54 times [2021-08-06 19:58:28,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:28,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764810381] [2021-08-06 19:58:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:28,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:28,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:28,219 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:28,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:28,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:28,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:58:28,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:58:28,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:58:28,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:28,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764810381] [2021-08-06 19:58:28,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764810381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:28,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967770323] [2021-08-06 19:58:28,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:58:28,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:28,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:28,391 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:28,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:58:30,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:58:30,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:30,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 19:58:30,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:31,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.3 percent of original size [2021-08-06 19:58:31,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.3 percent of original size [2021-08-06 19:58:31,757 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:58:31,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:58:31,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:31,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:58:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967770323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:31,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:31,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-06 19:58:31,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105889957] [2021-08-06 19:58:31,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:58:31,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:58:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:31,806 INFO L87 Difference]: Start difference. First operand 705 states and 1210 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:32,079 INFO L93 Difference]: Finished difference Result 1166 states and 2004 transitions. [2021-08-06 19:58:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:58:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 19:58:32,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:32,081 INFO L225 Difference]: With dead ends: 1166 [2021-08-06 19:58:32,081 INFO L226 Difference]: Without dead ends: 1157 [2021-08-06 19:58:32,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:58:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-08-06 19:58:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 725. [2021-08-06 19:58:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.718232044198895) internal successors, (1244), 724 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) [2021-08-06 19:58:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1244 transitions. [2021-08-06 19:58:32,088 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1244 transitions. Word has length 34 [2021-08-06 19:58:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:32,088 INFO L470 AbstractCegarLoop]: Abstraction has 725 states and 1244 transitions. [2021-08-06 19:58:32,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1244 transitions. [2021-08-06 19:58:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 19:58:32,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:32,089 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:32,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 19:58:32,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:58:32,290 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:32,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:32,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1294435523, now seen corresponding path program 55 times [2021-08-06 19:58:32,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:32,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719278462] [2021-08-06 19:58:32,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:32,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:32,398 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:32,401 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:32,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:58:32,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 19:58:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:58:32,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:32,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719278462] [2021-08-06 19:58:32,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719278462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:32,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810677554] [2021-08-06 19:58:32,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:58:32,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:32,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:32,552 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:32,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:58:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:35,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:35,974 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:58:35,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:58:36,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:36,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:58:36,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810677554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:36,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:36,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-06 19:58:36,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993747793] [2021-08-06 19:58:36,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:58:36,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:36,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:58:36,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:58:36,038 INFO L87 Difference]: Start difference. First operand 725 states and 1244 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:36,432 INFO L93 Difference]: Finished difference Result 1312 states and 2254 transitions. [2021-08-06 19:58:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:58:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 19:58:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:36,435 INFO L225 Difference]: With dead ends: 1312 [2021-08-06 19:58:36,435 INFO L226 Difference]: Without dead ends: 1285 [2021-08-06 19:58:36,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:58:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-08-06 19:58:36,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 751. [2021-08-06 19:58:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 1.7173333333333334) internal successors, (1288), 750 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) [2021-08-06 19:58:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1288 transitions. [2021-08-06 19:58:36,443 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1288 transitions. Word has length 34 [2021-08-06 19:58:36,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:36,443 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1288 transitions. [2021-08-06 19:58:36,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1288 transitions. [2021-08-06 19:58:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 19:58:36,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:36,444 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:36,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:36,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:36,665 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:36,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:36,665 INFO L82 PathProgramCache]: Analyzing trace with hash -482435801, now seen corresponding path program 56 times [2021-08-06 19:58:36,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:36,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107577846] [2021-08-06 19:58:36,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:36,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:36,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 19:58:36,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 19:58:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:58:36,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:36,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107577846] [2021-08-06 19:58:36,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107577846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:36,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257282721] [2021-08-06 19:58:36,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:58:36,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:36,913 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:36,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:58:39,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:58:39,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:39,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:58:39,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:40,430 INFO L354 Elim1Store]: treesize reduction 154, result has 4.3 percent of original size [2021-08-06 19:58:40,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 44 [2021-08-06 19:58:40,477 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:40,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:58:40,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257282721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:40,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:40,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-08-06 19:58:40,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769720330] [2021-08-06 19:58:40,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:58:40,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:58:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:58:40,483 INFO L87 Difference]: Start difference. First operand 751 states and 1288 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:40,760 INFO L93 Difference]: Finished difference Result 1248 states and 2138 transitions. [2021-08-06 19:58:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:58:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 19:58:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:40,762 INFO L225 Difference]: With dead ends: 1248 [2021-08-06 19:58:40,762 INFO L226 Difference]: Without dead ends: 1221 [2021-08-06 19:58:40,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 444.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:58:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-08-06 19:58:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 745. [2021-08-06 19:58:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.7150537634408602) internal successors, (1276), 744 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) [2021-08-06 19:58:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1276 transitions. [2021-08-06 19:58:40,770 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1276 transitions. Word has length 34 [2021-08-06 19:58:40,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:40,770 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 1276 transitions. [2021-08-06 19:58:40,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:40,770 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1276 transitions. [2021-08-06 19:58:40,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:58:40,771 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:40,771 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:40,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 19:58:40,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 19:58:40,971 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1898273288, now seen corresponding path program 57 times [2021-08-06 19:58:40,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:40,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171322886] [2021-08-06 19:58:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:40,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:41,031 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:41,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:41,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:41,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:41,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:41,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:41,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:41,131 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:41,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 41.5 percent of original size [2021-08-06 19:58:41,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 41.5 percent of original size [2021-08-06 19:58:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:58:41,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:41,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171322886] [2021-08-06 19:58:41,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171322886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:41,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694120281] [2021-08-06 19:58:41,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:58:41,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:41,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:41,289 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:41,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:58:44,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:58:44,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:44,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:58:44,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:45,152 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:58:45,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:58:45,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:45,227 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:45,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694120281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:45,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:45,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-06 19:58:45,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234415958] [2021-08-06 19:58:45,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:58:45,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:58:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:58:45,232 INFO L87 Difference]: Start difference. First operand 745 states and 1276 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:45,583 INFO L93 Difference]: Finished difference Result 1472 states and 2541 transitions. [2021-08-06 19:58:45,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:58:45,584 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:58:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:45,586 INFO L225 Difference]: With dead ends: 1472 [2021-08-06 19:58:45,586 INFO L226 Difference]: Without dead ends: 1454 [2021-08-06 19:58:45,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 615.7ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:58:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-06 19:58:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 773. [2021-08-06 19:58:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 1.7124352331606219) internal successors, (1322), 772 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) [2021-08-06 19:58:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1322 transitions. [2021-08-06 19:58:45,594 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1322 transitions. Word has length 36 [2021-08-06 19:58:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:45,594 INFO L470 AbstractCegarLoop]: Abstraction has 773 states and 1322 transitions. [2021-08-06 19:58:45,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1322 transitions. [2021-08-06 19:58:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:58:45,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:45,595 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:45,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:45,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-06 19:58:45,809 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1856858978, now seen corresponding path program 58 times [2021-08-06 19:58:45,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:45,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234750270] [2021-08-06 19:58:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:45,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:45,863 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:45,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:45,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:45,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:45,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:45,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:45,938 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:45,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:58:46,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:46,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234750270] [2021-08-06 19:58:46,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234750270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:46,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724266848] [2021-08-06 19:58:46,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:58:46,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:46,117 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:58:48,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:58:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:48,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:58:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:50,056 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:58:50,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:58:50,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:50,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:50,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724266848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:50,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:50,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-06 19:58:50,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085640346] [2021-08-06 19:58:50,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:58:50,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:50,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:58:50,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:58:50,126 INFO L87 Difference]: Start difference. First operand 773 states and 1322 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:50,639 INFO L93 Difference]: Finished difference Result 1694 states and 2918 transitions. [2021-08-06 19:58:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:58:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:58:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:50,643 INFO L225 Difference]: With dead ends: 1694 [2021-08-06 19:58:50,643 INFO L226 Difference]: Without dead ends: 1676 [2021-08-06 19:58:50,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:58:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-08-06 19:58:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 856. [2021-08-06 19:58:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.7228070175438597) internal successors, (1473), 855 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1473 transitions. [2021-08-06 19:58:50,652 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1473 transitions. Word has length 36 [2021-08-06 19:58:50,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:50,652 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1473 transitions. [2021-08-06 19:58:50,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:50,652 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1473 transitions. [2021-08-06 19:58:50,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:58:50,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:50,653 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:50,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:50,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:50,861 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash 164294152, now seen corresponding path program 59 times [2021-08-06 19:58:50,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:50,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822810197] [2021-08-06 19:58:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:50,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:50,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:50,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:50,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:50,934 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:50,964 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:50,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:50,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:50,992 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 19:58:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:58:51,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:51,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822810197] [2021-08-06 19:58:51,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822810197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:51,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136316352] [2021-08-06 19:58:51,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:58:51,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:51,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:51,170 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:51,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:58:54,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:58:54,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:54,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 19:58:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:58:54,125 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.7 percent of original size [2021-08-06 19:58:54,127 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.7 percent of original size [2021-08-06 19:58:55,125 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:58:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:58:55,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:55,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:58:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:55,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136316352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:55,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:58:55,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-06 19:58:55,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505042370] [2021-08-06 19:58:55,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:58:55,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:58:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:58:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:58:55,199 INFO L87 Difference]: Start difference. First operand 856 states and 1473 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:58:55,674 INFO L93 Difference]: Finished difference Result 1303 states and 2245 transitions. [2021-08-06 19:58:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:58:55,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:58:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:58:55,677 INFO L225 Difference]: With dead ends: 1303 [2021-08-06 19:58:55,677 INFO L226 Difference]: Without dead ends: 1294 [2021-08-06 19:58:55,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 605.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:58:55,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-06 19:58:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 862. [2021-08-06 19:58:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.7224157955865274) internal successors, (1483), 861 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1483 transitions. [2021-08-06 19:58:55,685 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1483 transitions. Word has length 36 [2021-08-06 19:58:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:58:55,685 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1483 transitions. [2021-08-06 19:58:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:58:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1483 transitions. [2021-08-06 19:58:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:58:55,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:58:55,686 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:58:55,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 19:58:55,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:55,909 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:58:55,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:58:55,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1800921984, now seen corresponding path program 60 times [2021-08-06 19:58:55,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:58:55,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982615550] [2021-08-06 19:58:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:58:55,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:58:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:58:55,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:55,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:58:55,993 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:55,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:58:56,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:56,027 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:58:56,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 41.5 percent of original size [2021-08-06 19:58:56,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 41.5 percent of original size [2021-08-06 19:58:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:58:56,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:58:56,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982615550] [2021-08-06 19:58:56,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982615550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:58:56,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414288336] [2021-08-06 19:58:56,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:58:56,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:58:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:58:56,240 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:58:56,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:58:59,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:58:59,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:58:59,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:58:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:00,315 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:59:00,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:59:00,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:00,383 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:00,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414288336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:00,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:00,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 19:59:00,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898871973] [2021-08-06 19:59:00,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 19:59:00,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:00,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 19:59:00,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:59:00,388 INFO L87 Difference]: Start difference. First operand 862 states and 1483 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:00,753 INFO L93 Difference]: Finished difference Result 1929 states and 3327 transitions. [2021-08-06 19:59:00,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:59:00,753 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:00,755 INFO L225 Difference]: With dead ends: 1929 [2021-08-06 19:59:00,755 INFO L226 Difference]: Without dead ends: 1893 [2021-08-06 19:59:00,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:59:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-06 19:59:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 902. [2021-08-06 19:59:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 1.7214206437291897) internal successors, (1551), 901 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1551 transitions. [2021-08-06 19:59:00,765 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1551 transitions. Word has length 36 [2021-08-06 19:59:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:00,765 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1551 transitions. [2021-08-06 19:59:00,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1551 transitions. [2021-08-06 19:59:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:00,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:00,767 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:00,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 19:59:00,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 19:59:00,967 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:00,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1261086954, now seen corresponding path program 61 times [2021-08-06 19:59:00,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:00,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009584666] [2021-08-06 19:59:00,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:00,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:01,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:01,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:01,047 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:01,049 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:01,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:01,082 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:01,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:01,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009584666] [2021-08-06 19:59:01,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009584666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:01,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699724601] [2021-08-06 19:59:01,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:59:01,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:01,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:01,291 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:01,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:59:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:04,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:04,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:05,427 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:59:05,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:59:05,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:05,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699724601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:05,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:05,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 19:59:05,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178403467] [2021-08-06 19:59:05,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 19:59:05,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 19:59:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:59:05,497 INFO L87 Difference]: Start difference. First operand 902 states and 1551 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:05,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:05,930 INFO L93 Difference]: Finished difference Result 2014 states and 3478 transitions. [2021-08-06 19:59:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:59:05,931 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:05,933 INFO L225 Difference]: With dead ends: 2014 [2021-08-06 19:59:05,933 INFO L226 Difference]: Without dead ends: 1978 [2021-08-06 19:59:05,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 661.0ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:59:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-08-06 19:59:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 984. [2021-08-06 19:59:05,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.7243133265513733) internal successors, (1695), 983 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:05,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1695 transitions. [2021-08-06 19:59:05,943 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1695 transitions. Word has length 36 [2021-08-06 19:59:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:05,944 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1695 transitions. [2021-08-06 19:59:05,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:05,944 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1695 transitions. [2021-08-06 19:59:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:05,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:05,945 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:05,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:06,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 19:59:06,145 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 760066176, now seen corresponding path program 62 times [2021-08-06 19:59:06,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:06,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945791168] [2021-08-06 19:59:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:06,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:06,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:06,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:06,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:06,222 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:06,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:06,257 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:06,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:06,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945791168] [2021-08-06 19:59:06,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945791168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:06,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103088906] [2021-08-06 19:59:06,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:59:06,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:06,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:06,488 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:06,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:59:09,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:59:09,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:09,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:09,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:10,684 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:59:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:59:10,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:10,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:10,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103088906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:10,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:10,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 19:59:10,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051151610] [2021-08-06 19:59:10,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 19:59:10,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:10,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 19:59:10,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:59:10,755 INFO L87 Difference]: Start difference. First operand 984 states and 1695 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:11,113 INFO L93 Difference]: Finished difference Result 1677 states and 2889 transitions. [2021-08-06 19:59:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:59:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:11,115 INFO L225 Difference]: With dead ends: 1677 [2021-08-06 19:59:11,115 INFO L226 Difference]: Without dead ends: 1668 [2021-08-06 19:59:11,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:59:11,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2021-08-06 19:59:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 984. [2021-08-06 19:59:11,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 1.7243133265513733) internal successors, (1695), 983 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1695 transitions. [2021-08-06 19:59:11,125 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1695 transitions. Word has length 36 [2021-08-06 19:59:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:11,125 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1695 transitions. [2021-08-06 19:59:11,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1695 transitions. [2021-08-06 19:59:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:11,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:11,126 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:11,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 19:59:11,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:11,326 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2090175620, now seen corresponding path program 63 times [2021-08-06 19:59:11,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:11,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305546971] [2021-08-06 19:59:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:11,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:11,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:11,382 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:11,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:11,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:11,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:11,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:11,574 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.0 percent of original size [2021-08-06 19:59:11,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.0 percent of original size [2021-08-06 19:59:11,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 75.6 percent of original size [2021-08-06 19:59:11,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 75.6 percent of original size [2021-08-06 19:59:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:59:11,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:11,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305546971] [2021-08-06 19:59:11,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305546971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:11,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333775402] [2021-08-06 19:59:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:59:11,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:11,645 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:11,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:59:14,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:59:14,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:14,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:18,953 INFO L354 Elim1Store]: treesize reduction 340, result has 3.7 percent of original size [2021-08-06 19:59:18,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 79 [2021-08-06 19:59:19,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:19,023 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:19,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333775402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:19,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:19,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-08-06 19:59:19,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439573608] [2021-08-06 19:59:19,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:59:19,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:59:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:59:19,028 INFO L87 Difference]: Start difference. First operand 984 states and 1695 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:26,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:26,668 INFO L93 Difference]: Finished difference Result 1534 states and 2601 transitions. [2021-08-06 19:59:26,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:59:26,668 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:26,670 INFO L225 Difference]: With dead ends: 1534 [2021-08-06 19:59:26,670 INFO L226 Difference]: Without dead ends: 1486 [2021-08-06 19:59:26,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 5907.8ms TimeCoverageRelationStatistics Valid=163, Invalid=1476, Unknown=1, NotChecked=0, Total=1640 [2021-08-06 19:59:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-08-06 19:59:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1113. [2021-08-06 19:59:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 1.724820143884892) internal successors, (1918), 1112 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:26,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1918 transitions. [2021-08-06 19:59:26,680 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1918 transitions. Word has length 36 [2021-08-06 19:59:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:26,681 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1918 transitions. [2021-08-06 19:59:26,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1918 transitions. [2021-08-06 19:59:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:26,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:26,682 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:26,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:26,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 19:59:26,897 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2070819046, now seen corresponding path program 64 times [2021-08-06 19:59:26,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:26,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105854024] [2021-08-06 19:59:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:26,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:26,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:26,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:26,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:26,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:27,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:27,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:27,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:27,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105854024] [2021-08-06 19:59:27,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105854024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:27,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788235046] [2021-08-06 19:59:27,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:59:27,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:27,260 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:27,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:59:30,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:59:30,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:30,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:31,649 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:59:31,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:59:31,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:31,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:31,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788235046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:31,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:31,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-06 19:59:31,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161379562] [2021-08-06 19:59:31,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:59:31,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:59:31,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:59:31,720 INFO L87 Difference]: Start difference. First operand 1113 states and 1918 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:32,200 INFO L93 Difference]: Finished difference Result 1870 states and 3220 transitions. [2021-08-06 19:59:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:59:32,200 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:32,202 INFO L225 Difference]: With dead ends: 1870 [2021-08-06 19:59:32,202 INFO L226 Difference]: Without dead ends: 1852 [2021-08-06 19:59:32,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:59:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-08-06 19:59:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1125. [2021-08-06 19:59:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 1.7277580071174377) internal successors, (1942), 1124 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:32,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1942 transitions. [2021-08-06 19:59:32,214 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1942 transitions. Word has length 36 [2021-08-06 19:59:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:32,214 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1942 transitions. [2021-08-06 19:59:32,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1942 transitions. [2021-08-06 19:59:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:32,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:32,215 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:32,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:32,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 19:59:32,429 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:32,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:32,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1372132514, now seen corresponding path program 65 times [2021-08-06 19:59:32,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:32,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197501907] [2021-08-06 19:59:32,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:32,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:32,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:32,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:32,524 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:32,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:32,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:32,559 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:32,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:32,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197501907] [2021-08-06 19:59:32,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197501907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:32,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527871144] [2021-08-06 19:59:32,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:59:32,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:32,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:32,801 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:32,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:59:36,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:59:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:36,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:36,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:37,247 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-06 19:59:37,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-06 19:59:37,321 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:37,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:37,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527871144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:37,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:37,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-06 19:59:37,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928971723] [2021-08-06 19:59:37,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 19:59:37,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:37,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 19:59:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:59:37,326 INFO L87 Difference]: Start difference. First operand 1125 states and 1942 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:37,858 INFO L93 Difference]: Finished difference Result 1989 states and 3419 transitions. [2021-08-06 19:59:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:59:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:37,860 INFO L225 Difference]: With dead ends: 1989 [2021-08-06 19:59:37,860 INFO L226 Difference]: Without dead ends: 1971 [2021-08-06 19:59:37,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 756.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:59:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-08-06 19:59:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1125. [2021-08-06 19:59:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 1.7277580071174377) internal successors, (1942), 1124 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1942 transitions. [2021-08-06 19:59:37,871 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1942 transitions. Word has length 36 [2021-08-06 19:59:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:37,871 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1942 transitions. [2021-08-06 19:59:37,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1942 transitions. [2021-08-06 19:59:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:37,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:37,873 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:37,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 19:59:38,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:38,073 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:38,074 INFO L82 PathProgramCache]: Analyzing trace with hash 649020616, now seen corresponding path program 66 times [2021-08-06 19:59:38,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:38,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105491112] [2021-08-06 19:59:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:38,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:38,126 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:38,152 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:38,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:38,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:38,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:38,213 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:38,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:38,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105491112] [2021-08-06 19:59:38,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105491112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:38,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401655614] [2021-08-06 19:59:38,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:59:38,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:38,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:38,470 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:38,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:59:41,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:59:41,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:41,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:43,646 INFO L354 Elim1Store]: treesize reduction 356, result has 3.5 percent of original size [2021-08-06 19:59:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 70 [2021-08-06 19:59:43,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:43,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:43,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401655614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:43,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:43,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 19:59:43,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513091227] [2021-08-06 19:59:43,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 19:59:43,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:43,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 19:59:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:59:43,728 INFO L87 Difference]: Start difference. First operand 1125 states and 1942 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:46,418 INFO L93 Difference]: Finished difference Result 1981 states and 3398 transitions. [2021-08-06 19:59:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:59:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:46,420 INFO L225 Difference]: With dead ends: 1981 [2021-08-06 19:59:46,420 INFO L226 Difference]: Without dead ends: 1930 [2021-08-06 19:59:46,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1661.9ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:59:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2021-08-06 19:59:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1184. [2021-08-06 19:59:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.7455621301775148) internal successors, (2065), 1183 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 2065 transitions. [2021-08-06 19:59:46,432 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 2065 transitions. Word has length 36 [2021-08-06 19:59:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:46,432 INFO L470 AbstractCegarLoop]: Abstraction has 1184 states and 2065 transitions. [2021-08-06 19:59:46,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 2065 transitions. [2021-08-06 19:59:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:46,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:46,433 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:46,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:46,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-06 19:59:46,649 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -902610624, now seen corresponding path program 67 times [2021-08-06 19:59:46,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:46,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728618950] [2021-08-06 19:59:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:46,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:46,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:46,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 19:59:46,732 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:46,734 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 61.9 percent of original size [2021-08-06 19:59:46,770 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:46,773 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 19:59:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:47,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:47,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728618950] [2021-08-06 19:59:47,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728618950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:47,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477892327] [2021-08-06 19:59:47,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:59:47,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:47,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:47,028 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:47,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:59:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:50,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:51,667 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:59:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:59:51,739 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:51,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:51,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477892327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:51,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:51,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 19:59:51,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456598972] [2021-08-06 19:59:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 19:59:51,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:51,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 19:59:51,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:59:51,744 INFO L87 Difference]: Start difference. First operand 1184 states and 2065 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:52,118 INFO L93 Difference]: Finished difference Result 1743 states and 3033 transitions. [2021-08-06 19:59:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:59:52,130 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:52,132 INFO L225 Difference]: With dead ends: 1743 [2021-08-06 19:59:52,132 INFO L226 Difference]: Without dead ends: 1734 [2021-08-06 19:59:52,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:59:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-08-06 19:59:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1190. [2021-08-06 19:59:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.7451640033641715) internal successors, (2075), 1189 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2075 transitions. [2021-08-06 19:59:52,143 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2075 transitions. Word has length 36 [2021-08-06 19:59:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:52,143 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 2075 transitions. [2021-08-06 19:59:52,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:52,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2075 transitions. [2021-08-06 19:59:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:52,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:52,145 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:52,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:52,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:52,345 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1141730282, now seen corresponding path program 68 times [2021-08-06 19:59:52,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:52,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524016969] [2021-08-06 19:59:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:52,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:52,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:59:52,425 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:59:52,441 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:59:52,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:59:52,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 19:59:52,544 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 19:59:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:59:52,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:52,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524016969] [2021-08-06 19:59:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524016969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:52,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476619513] [2021-08-06 19:59:52,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:59:52,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:52,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:52,718 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:59:56,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:59:56,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:59:56,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:59:56,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:59:57,411 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 19:59:57,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 19:59:57,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:57,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 19:59:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476619513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:57,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:59:57,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 19:59:57,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916750110] [2021-08-06 19:59:57,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:59:57,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:59:57,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:59:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:59:57,460 INFO L87 Difference]: Start difference. First operand 1190 states and 2075 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:59:57,773 INFO L93 Difference]: Finished difference Result 1829 states and 3175 transitions. [2021-08-06 19:59:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:59:57,773 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:59:57,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:59:57,775 INFO L225 Difference]: With dead ends: 1829 [2021-08-06 19:59:57,775 INFO L226 Difference]: Without dead ends: 1802 [2021-08-06 19:59:57,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:59:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-08-06 19:59:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1248. [2021-08-06 19:59:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 1.744186046511628) internal successors, (2175), 1247 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:57,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 2175 transitions. [2021-08-06 19:59:57,787 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 2175 transitions. Word has length 36 [2021-08-06 19:59:57,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:59:57,787 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 2175 transitions. [2021-08-06 19:59:57,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:59:57,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 2175 transitions. [2021-08-06 19:59:57,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:59:57,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:59:57,788 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:59:57,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 19:59:58,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:58,005 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:59:58,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:59:58,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1681565312, now seen corresponding path program 69 times [2021-08-06 19:59:58,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:59:58,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859718118] [2021-08-06 19:59:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:59:58,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:59:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:59:58,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:59:58,103 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 19:59:58,119 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:59:58,120 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 19:59:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:59:58,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:59:58,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859718118] [2021-08-06 19:59:58,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859718118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:59:58,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363255622] [2021-08-06 19:59:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:59:58,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:59:58,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:59:58,385 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:59:58,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 20:00:02,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:00:02,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:02,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:00:02,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:04,016 INFO L354 Elim1Store]: treesize reduction 356, result has 3.5 percent of original size [2021-08-06 20:00:04,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 104 treesize of output 70 [2021-08-06 20:00:04,063 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:04,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:04,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363255622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:04,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:04,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:00:04,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839786047] [2021-08-06 20:00:04,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:00:04,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:00:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:00:04,069 INFO L87 Difference]: Start difference. First operand 1248 states and 2175 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:07,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:07,557 INFO L93 Difference]: Finished difference Result 2096 states and 3580 transitions. [2021-08-06 20:00:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:00:07,558 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:07,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:07,560 INFO L225 Difference]: With dead ends: 2096 [2021-08-06 20:00:07,560 INFO L226 Difference]: Without dead ends: 2027 [2021-08-06 20:00:07,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2626.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1641, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:00:07,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-08-06 20:00:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1322. [2021-08-06 20:00:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.7464042392127177) internal successors, (2307), 1321 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2307 transitions. [2021-08-06 20:00:07,573 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2307 transitions. Word has length 36 [2021-08-06 20:00:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:07,574 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2307 transitions. [2021-08-06 20:00:07,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2307 transitions. [2021-08-06 20:00:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:07,575 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:07,575 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:07,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:07,776 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:07,776 INFO L82 PathProgramCache]: Analyzing trace with hash -592248854, now seen corresponding path program 70 times [2021-08-06 20:00:07,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:07,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031571783] [2021-08-06 20:00:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:07,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:07,829 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:07,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:07,846 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:07,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:08,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:08,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031571783] [2021-08-06 20:00:08,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031571783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:08,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412530316] [2021-08-06 20:00:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:00:08,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:08,112 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:08,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 20:00:11,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:00:11,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:11,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:00:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:13,113 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:13,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:13,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:13,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412530316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:13,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:13,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:00:13,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938707060] [2021-08-06 20:00:13,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:00:13,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:00:13,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:00:13,163 INFO L87 Difference]: Start difference. First operand 1322 states and 2307 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:13,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:13,524 INFO L93 Difference]: Finished difference Result 1820 states and 3158 transitions. [2021-08-06 20:00:13,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:00:13,525 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:13,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:13,527 INFO L225 Difference]: With dead ends: 1820 [2021-08-06 20:00:13,527 INFO L226 Difference]: Without dead ends: 1811 [2021-08-06 20:00:13,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:00:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-08-06 20:00:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1322. [2021-08-06 20:00:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.7464042392127177) internal successors, (2307), 1321 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2307 transitions. [2021-08-06 20:00:13,539 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2307 transitions. Word has length 36 [2021-08-06 20:00:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:13,539 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2307 transitions. [2021-08-06 20:00:13,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2307 transitions. [2021-08-06 20:00:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:13,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:13,541 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:13,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 20:00:13,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-06 20:00:13,745 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash 737860590, now seen corresponding path program 71 times [2021-08-06 20:00:13,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:13,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008611364] [2021-08-06 20:00:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:13,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:13,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:13,803 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:13,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:13,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:13,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:00:13,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:00:14,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:00:14,013 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:00:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:00:14,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:14,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008611364] [2021-08-06 20:00:14,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008611364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:14,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518962042] [2021-08-06 20:00:14,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:00:14,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:14,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:14,077 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:14,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 20:00:17,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:00:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:17,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:00:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:18,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.7 percent of original size [2021-08-06 20:00:18,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.7 percent of original size [2021-08-06 20:00:19,181 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:19,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:19,233 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:19,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:19,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518962042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:19,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:19,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 20:00:19,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046118974] [2021-08-06 20:00:19,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:00:19,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:00:19,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:00:19,239 INFO L87 Difference]: Start difference. First operand 1322 states and 2307 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:19,534 INFO L93 Difference]: Finished difference Result 2008 states and 3450 transitions. [2021-08-06 20:00:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:00:19,534 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:19,536 INFO L225 Difference]: With dead ends: 2008 [2021-08-06 20:00:19,536 INFO L226 Difference]: Without dead ends: 1890 [2021-08-06 20:00:19,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 644.2ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-08-06 20:00:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1320. [2021-08-06 20:00:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.7414708112206216) internal successors, (2297), 1319 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2297 transitions. [2021-08-06 20:00:19,549 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2297 transitions. Word has length 36 [2021-08-06 20:00:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:19,549 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 2297 transitions. [2021-08-06 20:00:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2297 transitions. [2021-08-06 20:00:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:19,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:19,551 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:19,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 20:00:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:19,751 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1570519752, now seen corresponding path program 72 times [2021-08-06 20:00:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:19,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119638584] [2021-08-06 20:00:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:19,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:19,806 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:19,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:19,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:19,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:20,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:20,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119638584] [2021-08-06 20:00:20,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119638584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:20,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076299458] [2021-08-06 20:00:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:00:20,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:20,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:20,141 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:20,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 20:00:24,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:00:24,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:24,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:00:24,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:25,259 INFO L354 Elim1Store]: treesize reduction 404, result has 3.1 percent of original size [2021-08-06 20:00:25,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 101 treesize of output 59 [2021-08-06 20:00:25,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:25,305 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:25,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076299458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:25,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:25,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:00:25,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664366206] [2021-08-06 20:00:25,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:00:25,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:00:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:25,310 INFO L87 Difference]: Start difference. First operand 1320 states and 2297 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:25,817 INFO L93 Difference]: Finished difference Result 2266 states and 3906 transitions. [2021-08-06 20:00:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:00:25,817 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:25,819 INFO L225 Difference]: With dead ends: 2266 [2021-08-06 20:00:25,819 INFO L226 Difference]: Without dead ends: 2239 [2021-08-06 20:00:25,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-08-06 20:00:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1352. [2021-08-06 20:00:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 1.7416728349370836) internal successors, (2353), 1351 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2353 transitions. [2021-08-06 20:00:25,833 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2353 transitions. Word has length 36 [2021-08-06 20:00:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:25,833 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 2353 transitions. [2021-08-06 20:00:25,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2353 transitions. [2021-08-06 20:00:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:25,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:25,834 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:25,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 20:00:26,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:26,035 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash -703294414, now seen corresponding path program 73 times [2021-08-06 20:00:26,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:26,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921935682] [2021-08-06 20:00:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:26,035 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:26,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:26,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:26,111 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:26,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:26,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:26,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921935682] [2021-08-06 20:00:26,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921935682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:26,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426685443] [2021-08-06 20:00:26,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:00:26,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:26,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:26,409 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:26,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 20:00:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:30,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:00:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:31,637 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:31,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:31,685 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:31,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:31,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:31,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426685443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:31,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:31,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:00:31,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309805311] [2021-08-06 20:00:31,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:00:31,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:31,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:00:31,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:31,691 INFO L87 Difference]: Start difference. First operand 1352 states and 2353 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:32,043 INFO L93 Difference]: Finished difference Result 1929 states and 3339 transitions. [2021-08-06 20:00:32,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:00:32,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:32,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:32,046 INFO L225 Difference]: With dead ends: 1929 [2021-08-06 20:00:32,046 INFO L226 Difference]: Without dead ends: 1920 [2021-08-06 20:00:32,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 607.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-08-06 20:00:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1357. [2021-08-06 20:00:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 1.7418879056047198) internal successors, (2362), 1356 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2362 transitions. [2021-08-06 20:00:32,072 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2362 transitions. Word has length 36 [2021-08-06 20:00:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:32,072 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 2362 transitions. [2021-08-06 20:00:32,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2362 transitions. [2021-08-06 20:00:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:32,074 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:32,074 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:32,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:32,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 20:00:32,274 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:32,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2040041642, now seen corresponding path program 74 times [2021-08-06 20:00:32,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:32,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809713760] [2021-08-06 20:00:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:32,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:32,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:32,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:32,347 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:32,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:32,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:32,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809713760] [2021-08-06 20:00:32,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809713760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:32,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049740399] [2021-08-06 20:00:32,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:00:32,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:32,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:32,642 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:32,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 20:00:36,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:00:36,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:36,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:00:36,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:37,987 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:38,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:38,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:38,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049740399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:38,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:00:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159295471] [2021-08-06 20:00:38,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:00:38,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:00:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:38,038 INFO L87 Difference]: Start difference. First operand 1357 states and 2362 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:38,285 INFO L93 Difference]: Finished difference Result 1876 states and 3254 transitions. [2021-08-06 20:00:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:00:38,286 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:38,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:38,288 INFO L225 Difference]: With dead ends: 1876 [2021-08-06 20:00:38,288 INFO L226 Difference]: Without dead ends: 1867 [2021-08-06 20:00:38,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 609.7ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-08-06 20:00:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1357. [2021-08-06 20:00:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 1.7418879056047198) internal successors, (2362), 1356 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2362 transitions. [2021-08-06 20:00:38,300 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2362 transitions. Word has length 36 [2021-08-06 20:00:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:38,300 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 2362 transitions. [2021-08-06 20:00:38,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2362 transitions. [2021-08-06 20:00:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:38,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:38,301 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:38,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:38,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-06 20:00:38,502 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:38,502 INFO L82 PathProgramCache]: Analyzing trace with hash -171718396, now seen corresponding path program 75 times [2021-08-06 20:00:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:38,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412196460] [2021-08-06 20:00:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:38,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:38,565 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:38,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:38,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:38,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:38,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:00:38,766 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:00:38,789 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:00:38,791 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:00:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:00:38,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:38,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412196460] [2021-08-06 20:00:38,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412196460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:38,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952157472] [2021-08-06 20:00:38,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:00:38,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:38,852 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:38,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 20:00:42,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:00:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:42,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:00:42,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:44,141 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:44,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:44,185 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:44,186 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:44,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952157472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:44,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:44,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 20:00:44,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140068415] [2021-08-06 20:00:44,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:00:44,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:44,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:00:44,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:00:44,191 INFO L87 Difference]: Start difference. First operand 1357 states and 2362 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:44,498 INFO L93 Difference]: Finished difference Result 2028 states and 3465 transitions. [2021-08-06 20:00:44,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:00:44,498 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:44,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:44,500 INFO L225 Difference]: With dead ends: 2028 [2021-08-06 20:00:44,500 INFO L226 Difference]: Without dead ends: 1926 [2021-08-06 20:00:44,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 590.1ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:00:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-08-06 20:00:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1417. [2021-08-06 20:00:44,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 1.7415254237288136) internal successors, (2466), 1416 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2466 transitions. [2021-08-06 20:00:44,513 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2466 transitions. Word has length 36 [2021-08-06 20:00:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:44,514 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 2466 transitions. [2021-08-06 20:00:44,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2466 transitions. [2021-08-06 20:00:44,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:44,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:44,515 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:44,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 20:00:44,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:44,716 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:44,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1645690500, now seen corresponding path program 76 times [2021-08-06 20:00:44,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:44,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771193837] [2021-08-06 20:00:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:44,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:44,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:44,787 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:44,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:44,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:44,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:00:44,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:00:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:45,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:45,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771193837] [2021-08-06 20:00:45,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771193837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:45,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886930558] [2021-08-06 20:00:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:00:45,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:45,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:45,089 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 20:00:49,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:00:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:49,419 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:00:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:50,543 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:50,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:50,589 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:50,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:50,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886930558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:50,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:50,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:00:50,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857132187] [2021-08-06 20:00:50,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:00:50,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:00:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:00:50,595 INFO L87 Difference]: Start difference. First operand 1417 states and 2466 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:50,862 INFO L93 Difference]: Finished difference Result 2577 states and 4489 transitions. [2021-08-06 20:00:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:00:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:50,865 INFO L225 Difference]: With dead ends: 2577 [2021-08-06 20:00:50,865 INFO L226 Difference]: Without dead ends: 2550 [2021-08-06 20:00:50,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:00:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-08-06 20:00:50,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1412. [2021-08-06 20:00:50,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 1.739900779588944) internal successors, (2455), 1411 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2455 transitions. [2021-08-06 20:00:50,890 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2455 transitions. Word has length 36 [2021-08-06 20:00:50,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:50,890 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 2455 transitions. [2021-08-06 20:00:50,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2455 transitions. [2021-08-06 20:00:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:50,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:50,892 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:50,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 20:00:51,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:51,092 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:51,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:51,093 INFO L82 PathProgramCache]: Analyzing trace with hash 660940766, now seen corresponding path program 77 times [2021-08-06 20:00:51,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:51,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934610882] [2021-08-06 20:00:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:51,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:51,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:51,151 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:51,167 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:51,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:51,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:51,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934610882] [2021-08-06 20:00:51,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934610882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:51,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231710306] [2021-08-06 20:00:51,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:00:51,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:51,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:51,482 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:51,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 20:00:55,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:00:55,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:00:55,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:00:55,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:00:56,890 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:00:56,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:00:56,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:56,935 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:00:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:56,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231710306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:56,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:00:56,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:00:56,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465928992] [2021-08-06 20:00:56,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:00:56,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:00:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:00:56,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:56,939 INFO L87 Difference]: Start difference. First operand 1412 states and 2455 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:57,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:00:57,399 INFO L93 Difference]: Finished difference Result 2374 states and 4114 transitions. [2021-08-06 20:00:57,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:00:57,399 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:00:57,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:00:57,402 INFO L225 Difference]: With dead ends: 2374 [2021-08-06 20:00:57,402 INFO L226 Difference]: Without dead ends: 2347 [2021-08-06 20:00:57,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 598.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:00:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-08-06 20:00:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1433. [2021-08-06 20:00:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.7416201117318435) internal successors, (2494), 1432 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2494 transitions. [2021-08-06 20:00:57,415 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2494 transitions. Word has length 36 [2021-08-06 20:00:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:00:57,415 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2494 transitions. [2021-08-06 20:00:57,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:00:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2494 transitions. [2021-08-06 20:00:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:00:57,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:00:57,416 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:00:57,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 20:00:57,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-06 20:00:57,617 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:00:57,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:00:57,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1612873400, now seen corresponding path program 78 times [2021-08-06 20:00:57,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:00:57,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236086312] [2021-08-06 20:00:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:00:57,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:00:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:00:57,675 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:57,676 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:00:57,691 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:57,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:00:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:00:58,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:00:58,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236086312] [2021-08-06 20:00:58,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236086312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:00:58,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371904022] [2021-08-06 20:00:58,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:00:58,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:00:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:00:58,015 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:00:58,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 20:01:02,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:01:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:02,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:03,537 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:03,582 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:03,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:03,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371904022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:03,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:03,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:01:03,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707469712] [2021-08-06 20:01:03,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:01:03,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:01:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:03,587 INFO L87 Difference]: Start difference. First operand 1433 states and 2494 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:03,927 INFO L93 Difference]: Finished difference Result 1957 states and 3397 transitions. [2021-08-06 20:01:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:01:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:03,930 INFO L225 Difference]: With dead ends: 1957 [2021-08-06 20:01:03,930 INFO L226 Difference]: Without dead ends: 1948 [2021-08-06 20:01:03,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 622.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-08-06 20:01:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1440. [2021-08-06 20:01:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.7421820708825573) internal successors, (2507), 1439 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2507 transitions. [2021-08-06 20:01:03,942 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2507 transitions. Word has length 36 [2021-08-06 20:01:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:03,942 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 2507 transitions. [2021-08-06 20:01:03,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2507 transitions. [2021-08-06 20:01:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:03,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:03,944 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:03,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 20:01:04,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:04,144 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:04,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:04,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1130462656, now seen corresponding path program 79 times [2021-08-06 20:01:04,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:04,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716530281] [2021-08-06 20:01:04,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:04,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:04,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:04,224 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:04,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:04,241 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:01:04,242 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:01:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:04,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:04,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716530281] [2021-08-06 20:01:04,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716530281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:04,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593099051] [2021-08-06 20:01:04,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:04,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:04,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:04,525 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:04,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 20:01:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:08,938 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:08,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:10,160 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:10,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:10,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:10,207 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593099051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:10,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:10,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:01:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962555054] [2021-08-06 20:01:10,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:01:10,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:01:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:10,212 INFO L87 Difference]: Start difference. First operand 1440 states and 2507 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:10,587 INFO L93 Difference]: Finished difference Result 1915 states and 3329 transitions. [2021-08-06 20:01:10,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:01:10,588 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:10,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:10,590 INFO L225 Difference]: With dead ends: 1915 [2021-08-06 20:01:10,590 INFO L226 Difference]: Without dead ends: 1906 [2021-08-06 20:01:10,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-08-06 20:01:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1440. [2021-08-06 20:01:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 1.7421820708825573) internal successors, (2507), 1439 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2507 transitions. [2021-08-06 20:01:10,602 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2507 transitions. Word has length 36 [2021-08-06 20:01:10,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:10,602 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 2507 transitions. [2021-08-06 20:01:10,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:10,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2507 transitions. [2021-08-06 20:01:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:10,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:10,604 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:10,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 20:01:10,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:10,804 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:10,805 INFO L82 PathProgramCache]: Analyzing trace with hash 2133402794, now seen corresponding path program 80 times [2021-08-06 20:01:10,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:10,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066239718] [2021-08-06 20:01:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:10,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:10,864 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:10,866 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:10,882 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:01:10,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 32.5 percent of original size [2021-08-06 20:01:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:11,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:11,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066239718] [2021-08-06 20:01:11,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066239718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:11,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076288139] [2021-08-06 20:01:11,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:11,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:11,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:11,169 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:11,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 20:01:15,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:15,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:15,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:16,899 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:16,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:16,944 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:16,944 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:16,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076288139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:16,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:16,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:01:16,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303167240] [2021-08-06 20:01:16,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:01:16,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:01:16,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:16,950 INFO L87 Difference]: Start difference. First operand 1440 states and 2507 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:17,411 INFO L93 Difference]: Finished difference Result 1859 states and 3233 transitions. [2021-08-06 20:01:17,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:01:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:17,414 INFO L225 Difference]: With dead ends: 1859 [2021-08-06 20:01:17,414 INFO L226 Difference]: Without dead ends: 1850 [2021-08-06 20:01:17,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2021-08-06 20:01:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1443. [2021-08-06 20:01:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 1.742024965325936) internal successors, (2512), 1442 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2512 transitions. [2021-08-06 20:01:17,426 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2512 transitions. Word has length 36 [2021-08-06 20:01:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:17,426 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 2512 transitions. [2021-08-06 20:01:17,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2512 transitions. [2021-08-06 20:01:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:17,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:17,428 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:17,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 20:01:17,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-06 20:01:17,628 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1436006992, now seen corresponding path program 81 times [2021-08-06 20:01:17,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:17,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982714753] [2021-08-06 20:01:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:17,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:17,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:17,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:17,749 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:17,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:17,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 20:01:17,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 20:01:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:01:17,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:17,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982714753] [2021-08-06 20:01:17,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982714753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:17,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195546484] [2021-08-06 20:01:17,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:01:17,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:17,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:17,962 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:17,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 20:01:22,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:01:22,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:22,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:23,720 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:23,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:23,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:23,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:23,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195546484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:23,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:23,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-08-06 20:01:23,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591588248] [2021-08-06 20:01:23,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:01:23,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:01:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:23,794 INFO L87 Difference]: Start difference. First operand 1443 states and 2512 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:24,451 INFO L93 Difference]: Finished difference Result 2953 states and 5155 transitions. [2021-08-06 20:01:24,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:01:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:24,454 INFO L225 Difference]: With dead ends: 2953 [2021-08-06 20:01:24,454 INFO L226 Difference]: Without dead ends: 2935 [2021-08-06 20:01:24,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:01:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-08-06 20:01:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 1501. [2021-08-06 20:01:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 1.7386666666666666) internal successors, (2608), 1500 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 2608 transitions. [2021-08-06 20:01:24,472 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 2608 transitions. Word has length 36 [2021-08-06 20:01:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 2608 transitions. [2021-08-06 20:01:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 2608 transitions. [2021-08-06 20:01:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:24,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:24,474 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:24,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:24,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:24,674 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:24,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2031779016, now seen corresponding path program 82 times [2021-08-06 20:01:24,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:24,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374944597] [2021-08-06 20:01:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:24,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:24,761 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:24,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:24,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:24,823 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:25,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:25,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374944597] [2021-08-06 20:01:25,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374944597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:25,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370902599] [2021-08-06 20:01:25,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:01:25,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:25,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:25,063 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:25,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 20:01:29,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:01:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:29,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:30,966 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:30,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:31,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:31,039 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370902599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:31,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:31,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 20:01:31,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214725124] [2021-08-06 20:01:31,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:01:31,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:01:31,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:01:31,044 INFO L87 Difference]: Start difference. First operand 1501 states and 2608 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:31,696 INFO L93 Difference]: Finished difference Result 2989 states and 5209 transitions. [2021-08-06 20:01:31,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:01:31,696 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:31,699 INFO L225 Difference]: With dead ends: 2989 [2021-08-06 20:01:31,699 INFO L226 Difference]: Without dead ends: 2971 [2021-08-06 20:01:31,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 743.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:01:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2971 states. [2021-08-06 20:01:31,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2971 to 1570. [2021-08-06 20:01:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 1.7380497131931167) internal successors, (2727), 1569 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 2727 transitions. [2021-08-06 20:01:31,723 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 2727 transitions. Word has length 36 [2021-08-06 20:01:31,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:31,723 INFO L470 AbstractCegarLoop]: Abstraction has 1570 states and 2727 transitions. [2021-08-06 20:01:31,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 2727 transitions. [2021-08-06 20:01:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:31,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:31,724 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:31,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:31,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:31,925 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:31,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1920733456, now seen corresponding path program 83 times [2021-08-06 20:01:31,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:31,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642691227] [2021-08-06 20:01:31,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:31,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:32,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:32,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:32,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:32,138 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:32,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:32,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642691227] [2021-08-06 20:01:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642691227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:32,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433521102] [2021-08-06 20:01:32,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:01:32,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:32,411 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:32,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 20:01:37,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:01:37,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:37,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:38,218 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:38,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:38,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:38,300 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:38,304 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:38,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433521102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:38,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:38,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 20:01:38,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824310586] [2021-08-06 20:01:38,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:01:38,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:01:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:01:38,305 INFO L87 Difference]: Start difference. First operand 1570 states and 2727 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:39,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:39,012 INFO L93 Difference]: Finished difference Result 3010 states and 5238 transitions. [2021-08-06 20:01:39,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:01:39,013 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:39,016 INFO L225 Difference]: With dead ends: 3010 [2021-08-06 20:01:39,016 INFO L226 Difference]: Without dead ends: 2992 [2021-08-06 20:01:39,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 775.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:01:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-08-06 20:01:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1616. [2021-08-06 20:01:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 1.736842105263158) internal successors, (2805), 1615 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 2805 transitions. [2021-08-06 20:01:39,032 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 2805 transitions. Word has length 36 [2021-08-06 20:01:39,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:39,033 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 2805 transitions. [2021-08-06 20:01:39,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 2805 transitions. [2021-08-06 20:01:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:39,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:39,034 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:39,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:39,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 20:01:39,235 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:39,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:39,235 INFO L82 PathProgramCache]: Analyzing trace with hash 369102216, now seen corresponding path program 84 times [2021-08-06 20:01:39,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:39,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445078816] [2021-08-06 20:01:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:39,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:39,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:39,353 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 64.4 percent of original size [2021-08-06 20:01:39,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:39,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:01:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:39,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:39,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445078816] [2021-08-06 20:01:39,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445078816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:39,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707182255] [2021-08-06 20:01:39,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:01:39,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:39,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:39,643 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:39,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 20:01:44,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:01:44,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:44,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:45,766 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:45,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:45,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:45,849 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:45,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707182255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:45,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:45,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-08-06 20:01:45,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248530401] [2021-08-06 20:01:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:01:45,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:01:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:01:45,854 INFO L87 Difference]: Start difference. First operand 1616 states and 2805 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:46,541 INFO L93 Difference]: Finished difference Result 2969 states and 5179 transitions. [2021-08-06 20:01:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:01:46,541 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:46,544 INFO L225 Difference]: With dead ends: 2969 [2021-08-06 20:01:46,544 INFO L226 Difference]: Without dead ends: 2951 [2021-08-06 20:01:46,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 815.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:01:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-08-06 20:01:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 1631. [2021-08-06 20:01:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 1.7361963190184049) internal successors, (2830), 1630 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2830 transitions. [2021-08-06 20:01:46,565 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2830 transitions. Word has length 36 [2021-08-06 20:01:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:46,565 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 2830 transitions. [2021-08-06 20:01:46,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2830 transitions. [2021-08-06 20:01:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:46,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:46,567 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:46,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:46,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:46,768 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:46,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:46,768 INFO L82 PathProgramCache]: Analyzing trace with hash 679463986, now seen corresponding path program 85 times [2021-08-06 20:01:46,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:46,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588072252] [2021-08-06 20:01:46,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:46,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:46,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:46,890 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:47,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:47,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588072252] [2021-08-06 20:01:47,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588072252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:47,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615508930] [2021-08-06 20:01:47,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:01:47,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:47,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:47,193 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:47,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 20:01:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:52,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:01:53,238 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:01:53,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:01:53,282 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:53,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:01:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:53,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615508930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:53,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:01:53,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:01:53,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061523285] [2021-08-06 20:01:53,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:01:53,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:01:53,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:01:53,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:01:53,288 INFO L87 Difference]: Start difference. First operand 1631 states and 2830 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:53,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:01:53,694 INFO L93 Difference]: Finished difference Result 2508 states and 4336 transitions. [2021-08-06 20:01:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:01:53,694 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:01:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:01:53,697 INFO L225 Difference]: With dead ends: 2508 [2021-08-06 20:01:53,697 INFO L226 Difference]: Without dead ends: 2481 [2021-08-06 20:01:53,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:01:53,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-08-06 20:01:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1625. [2021-08-06 20:01:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 1.7364532019704433) internal successors, (2820), 1624 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2820 transitions. [2021-08-06 20:01:53,713 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2820 transitions. Word has length 36 [2021-08-06 20:01:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:01:53,713 INFO L470 AbstractCegarLoop]: Abstraction has 1625 states and 2820 transitions. [2021-08-06 20:01:53,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:01:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2820 transitions. [2021-08-06 20:01:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:01:53,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:01:53,715 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:01:53,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:01:53,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:53,925 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:01:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:01:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash 568418426, now seen corresponding path program 86 times [2021-08-06 20:01:53,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:01:53,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329549517] [2021-08-06 20:01:53,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:01:53,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:01:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:01:54,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:54,062 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:01:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:01:54,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:01:54,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329549517] [2021-08-06 20:01:54,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329549517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:01:54,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353718786] [2021-08-06 20:01:54,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:01:54,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:01:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:01:54,385 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:01:54,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 20:01:59,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:01:59,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:01:59,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:01:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:00,561 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:00,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:00,606 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:00,607 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:00,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353718786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:00,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:00,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:02:00,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742934451] [2021-08-06 20:02:00,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:02:00,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:02:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:02:00,612 INFO L87 Difference]: Start difference. First operand 1625 states and 2820 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:00,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:00,963 INFO L93 Difference]: Finished difference Result 2498 states and 4314 transitions. [2021-08-06 20:02:00,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:02:00,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:00,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:00,966 INFO L225 Difference]: With dead ends: 2498 [2021-08-06 20:02:00,966 INFO L226 Difference]: Without dead ends: 2471 [2021-08-06 20:02:00,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:02:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-06 20:02:00,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1623. [2021-08-06 20:02:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 1.7361282367447595) internal successors, (2816), 1622 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2816 transitions. [2021-08-06 20:02:00,982 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2816 transitions. Word has length 36 [2021-08-06 20:02:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:00,982 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2816 transitions. [2021-08-06 20:02:00,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2816 transitions. [2021-08-06 20:02:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:00,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:00,984 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:01,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 20:02:01,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:01,205 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:01,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash -983212814, now seen corresponding path program 87 times [2021-08-06 20:02:01,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:01,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702395334] [2021-08-06 20:02:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:01,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:01,362 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:01,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:01,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:01,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702395334] [2021-08-06 20:02:01,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702395334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:01,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732499096] [2021-08-06 20:02:01,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:02:01,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:01,681 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:01,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 20:02:06,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:02:06,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:06,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:07,926 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:07,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:07,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:07,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732499096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:07,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:07,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:02:07,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163014436] [2021-08-06 20:02:07,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:02:07,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:07,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:02:07,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:02:07,976 INFO L87 Difference]: Start difference. First operand 1623 states and 2816 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:08,358 INFO L93 Difference]: Finished difference Result 2583 states and 4475 transitions. [2021-08-06 20:02:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:02:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:08,361 INFO L225 Difference]: With dead ends: 2583 [2021-08-06 20:02:08,361 INFO L226 Difference]: Without dead ends: 2556 [2021-08-06 20:02:08,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 628.3ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:02:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-08-06 20:02:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1643. [2021-08-06 20:02:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 1.7356881851400732) internal successors, (2850), 1642 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 2850 transitions. [2021-08-06 20:02:08,387 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 2850 transitions. Word has length 36 [2021-08-06 20:02:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:08,388 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 2850 transitions. [2021-08-06 20:02:08,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 2850 transitions. [2021-08-06 20:02:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:08,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:08,390 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:08,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 20:02:08,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-08-06 20:02:08,590 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash -341160560, now seen corresponding path program 88 times [2021-08-06 20:02:08,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:08,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173574807] [2021-08-06 20:02:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:08,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:08,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:08,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:09,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173574807] [2021-08-06 20:02:09,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173574807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:09,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281963940] [2021-08-06 20:02:09,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:02:09,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:09,005 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:09,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 20:02:14,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:02:14,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:14,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:15,351 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:15,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:15,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:15,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281963940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:15,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:15,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:02:15,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558528237] [2021-08-06 20:02:15,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:02:15,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:02:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:02:15,401 INFO L87 Difference]: Start difference. First operand 1643 states and 2850 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:15,896 INFO L93 Difference]: Finished difference Result 2474 states and 4279 transitions. [2021-08-06 20:02:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:02:15,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:15,898 INFO L225 Difference]: With dead ends: 2474 [2021-08-06 20:02:15,898 INFO L226 Difference]: Without dead ends: 2456 [2021-08-06 20:02:15,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 624.1ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:02:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-08-06 20:02:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1639. [2021-08-06 20:02:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.735042735042735) internal successors, (2842), 1638 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2842 transitions. [2021-08-06 20:02:15,914 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2842 transitions. Word has length 36 [2021-08-06 20:02:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:15,914 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2842 transitions. [2021-08-06 20:02:15,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2842 transitions. [2021-08-06 20:02:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:15,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:15,915 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:15,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 20:02:16,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:16,116 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:16,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:16,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1892791800, now seen corresponding path program 89 times [2021-08-06 20:02:16,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:16,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080593692] [2021-08-06 20:02:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:16,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:16,177 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:16,178 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:16,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:16,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080593692] [2021-08-06 20:02:16,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080593692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:16,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555343882] [2021-08-06 20:02:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:02:16,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:16,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:16,581 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:16,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 20:02:21,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:02:21,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:21,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:22,911 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:22,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:22,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:22,956 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555343882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:22,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:22,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:02:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212602939] [2021-08-06 20:02:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:02:22,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:22,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:02:22,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:02:22,961 INFO L87 Difference]: Start difference. First operand 1639 states and 2842 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:23,472 INFO L93 Difference]: Finished difference Result 2380 states and 4120 transitions. [2021-08-06 20:02:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:02:23,473 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:23,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:23,476 INFO L225 Difference]: With dead ends: 2380 [2021-08-06 20:02:23,476 INFO L226 Difference]: Without dead ends: 2371 [2021-08-06 20:02:23,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:02:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-08-06 20:02:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1642. [2021-08-06 20:02:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 1.7349177330895795) internal successors, (2847), 1641 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2847 transitions. [2021-08-06 20:02:23,495 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2847 transitions. Word has length 36 [2021-08-06 20:02:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:23,495 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2847 transitions. [2021-08-06 20:02:23,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2847 transitions. [2021-08-06 20:02:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:23,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:23,500 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:23,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:23,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:23,717 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:23,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:23,717 INFO L82 PathProgramCache]: Analyzing trace with hash -889851662, now seen corresponding path program 90 times [2021-08-06 20:02:23,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:23,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8817851] [2021-08-06 20:02:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:23,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:23,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:23,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:24,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:24,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8817851] [2021-08-06 20:02:24,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8817851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:24,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267022790] [2021-08-06 20:02:24,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:02:24,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:24,112 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:24,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 20:02:29,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:02:29,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:29,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:30,577 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:30,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:30,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:30,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:30,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267022790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:30,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:30,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:02:30,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110360661] [2021-08-06 20:02:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:02:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:30,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:02:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:02:30,630 INFO L87 Difference]: Start difference. First operand 1642 states and 2847 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:31,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:31,152 INFO L93 Difference]: Finished difference Result 2384 states and 4128 transitions. [2021-08-06 20:02:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:02:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:31,154 INFO L225 Difference]: With dead ends: 2384 [2021-08-06 20:02:31,154 INFO L226 Difference]: Without dead ends: 2375 [2021-08-06 20:02:31,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:02:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-08-06 20:02:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 1639. [2021-08-06 20:02:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.735042735042735) internal successors, (2842), 1638 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2842 transitions. [2021-08-06 20:02:31,169 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2842 transitions. Word has length 36 [2021-08-06 20:02:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:31,169 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 2842 transitions. [2021-08-06 20:02:31,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2842 transitions. [2021-08-06 20:02:31,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:31,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:31,170 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:31,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 20:02:31,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:31,371 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash -417104918, now seen corresponding path program 91 times [2021-08-06 20:02:31,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:31,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732450429] [2021-08-06 20:02:31,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:31,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:31,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:31,521 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:31,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:31,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:02:31,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:02:31,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 39.1 percent of original size [2021-08-06 20:02:31,655 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 39.1 percent of original size [2021-08-06 20:02:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:02:31,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:31,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732450429] [2021-08-06 20:02:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732450429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:31,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37861672] [2021-08-06 20:02:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:02:31,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:31,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:31,791 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:31,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 20:02:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:37,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:37,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:38,091 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:38,135 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:38,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:38,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37861672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:38,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:38,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 20:02:38,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312950651] [2021-08-06 20:02:38,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:02:38,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:38,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:02:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:02:38,141 INFO L87 Difference]: Start difference. First operand 1639 states and 2842 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:38,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:38,571 INFO L93 Difference]: Finished difference Result 2678 states and 4596 transitions. [2021-08-06 20:02:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:02:38,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:38,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:38,573 INFO L225 Difference]: With dead ends: 2678 [2021-08-06 20:02:38,573 INFO L226 Difference]: Without dead ends: 2573 [2021-08-06 20:02:38,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:02:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-08-06 20:02:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 1667. [2021-08-06 20:02:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 1.7334933973589435) internal successors, (2888), 1666 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:38,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 2888 transitions. [2021-08-06 20:02:38,588 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 2888 transitions. Word has length 36 [2021-08-06 20:02:38,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:38,589 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 2888 transitions. [2021-08-06 20:02:38,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:38,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 2888 transitions. [2021-08-06 20:02:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:38,590 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:38,590 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:38,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 20:02:38,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:38,790 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash -887440184, now seen corresponding path program 92 times [2021-08-06 20:02:38,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:38,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999092517] [2021-08-06 20:02:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:38,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:38,849 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:38,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:39,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:39,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999092517] [2021-08-06 20:02:39,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999092517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:39,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516217193] [2021-08-06 20:02:39,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:02:39,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:39,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:39,131 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:39,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 20:02:44,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:02:44,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:44,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:44,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:45,719 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:45,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:45,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:45,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:45,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516217193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:45,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:45,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 20:02:45,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729513306] [2021-08-06 20:02:45,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:02:45,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:45,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:02:45,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:02:45,769 INFO L87 Difference]: Start difference. First operand 1667 states and 2888 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:46,320 INFO L93 Difference]: Finished difference Result 2633 states and 4495 transitions. [2021-08-06 20:02:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:02:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:46,323 INFO L225 Difference]: With dead ends: 2633 [2021-08-06 20:02:46,323 INFO L226 Difference]: Without dead ends: 2516 [2021-08-06 20:02:46,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:02:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-08-06 20:02:46,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1663. [2021-08-06 20:02:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.7316486161251505) internal successors, (2878), 1662 states have internal predecessors, (2878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2878 transitions. [2021-08-06 20:02:46,363 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2878 transitions. Word has length 36 [2021-08-06 20:02:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 2878 transitions. [2021-08-06 20:02:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2878 transitions. [2021-08-06 20:02:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:46,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:46,364 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:46,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 20:02:46,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 20:02:46,565 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1985728682, now seen corresponding path program 93 times [2021-08-06 20:02:46,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:46,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933152743] [2021-08-06 20:02:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:46,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:46,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:46,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:46,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:46,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933152743] [2021-08-06 20:02:46,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933152743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:46,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709646459] [2021-08-06 20:02:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:02:46,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:46,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:46,922 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:46,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 20:02:52,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:02:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:02:52,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:02:52,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:02:53,473 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:02:53,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:02:53,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:53,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:02:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:53,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709646459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:53,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:02:53,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:02:53,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526035788] [2021-08-06 20:02:53,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:02:53,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:02:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:02:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:02:53,522 INFO L87 Difference]: Start difference. First operand 1663 states and 2878 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:02:53,999 INFO L93 Difference]: Finished difference Result 2325 states and 4023 transitions. [2021-08-06 20:02:53,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:02:53,999 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:02:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:02:54,002 INFO L225 Difference]: With dead ends: 2325 [2021-08-06 20:02:54,002 INFO L226 Difference]: Without dead ends: 2298 [2021-08-06 20:02:54,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 571.1ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:02:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-06 20:02:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 1660. [2021-08-06 20:02:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 1.7317661241711875) internal successors, (2873), 1659 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 2873 transitions. [2021-08-06 20:02:54,016 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 2873 transitions. Word has length 36 [2021-08-06 20:02:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:02:54,016 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 2873 transitions. [2021-08-06 20:02:54,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:02:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 2873 transitions. [2021-08-06 20:02:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:02:54,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:02:54,018 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:02:54,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 20:02:54,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-06 20:02:54,218 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:02:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:02:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash -998485744, now seen corresponding path program 94 times [2021-08-06 20:02:54,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:02:54,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892141036] [2021-08-06 20:02:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:02:54,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:02:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:02:54,366 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:54,368 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:02:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:02:54,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:02:54,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892141036] [2021-08-06 20:02:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892141036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:02:54,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879974872] [2021-08-06 20:02:54,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:02:54,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:02:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:02:54,673 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:02:54,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 20:03:00,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:00,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:00,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:03:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:01,397 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:03:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:03:01,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:01,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:01,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879974872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:01,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:01,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:03:01,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050355007] [2021-08-06 20:03:01,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:03:01,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:03:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:03:01,450 INFO L87 Difference]: Start difference. First operand 1660 states and 2873 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:02,043 INFO L93 Difference]: Finished difference Result 2619 states and 4469 transitions. [2021-08-06 20:03:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:03:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:02,046 INFO L225 Difference]: With dead ends: 2619 [2021-08-06 20:03:02,046 INFO L226 Difference]: Without dead ends: 2508 [2021-08-06 20:03:02,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 841.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:03:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-08-06 20:03:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 1680. [2021-08-06 20:03:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 1.7325789160214413) internal successors, (2909), 1679 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2909 transitions. [2021-08-06 20:03:02,061 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2909 transitions. Word has length 36 [2021-08-06 20:03:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:02,061 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 2909 transitions. [2021-08-06 20:03:02,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2909 transitions. [2021-08-06 20:03:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:02,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:02,062 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:02,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:02,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 20:03:02,263 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1874683122, now seen corresponding path program 95 times [2021-08-06 20:03:02,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:02,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843140497] [2021-08-06 20:03:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:02,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:02,404 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:02,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:02,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:02,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843140497] [2021-08-06 20:03:02,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843140497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:02,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152529981] [2021-08-06 20:03:02,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:02,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:02,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:02,723 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:02,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 20:03:08,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:03:08,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:08,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:03:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:09,319 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-06 20:03:09,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-06 20:03:09,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:09,377 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:09,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152529981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:09,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:09,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-08-06 20:03:09,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618574609] [2021-08-06 20:03:09,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-06 20:03:09,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:09,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-06 20:03:09,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:03:09,382 INFO L87 Difference]: Start difference. First operand 1680 states and 2909 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:11,266 INFO L93 Difference]: Finished difference Result 2445 states and 4198 transitions. [2021-08-06 20:03:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:03:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:11,269 INFO L225 Difference]: With dead ends: 2445 [2021-08-06 20:03:11,269 INFO L226 Difference]: Without dead ends: 2367 [2021-08-06 20:03:11,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1766.3ms TimeCoverageRelationStatistics Valid=264, Invalid=2928, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 20:03:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-06 20:03:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1728. [2021-08-06 20:03:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.7353792704111175) internal successors, (2997), 1727 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2997 transitions. [2021-08-06 20:03:11,284 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2997 transitions. Word has length 36 [2021-08-06 20:03:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:11,284 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2997 transitions. [2021-08-06 20:03:11,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2997 transitions. [2021-08-06 20:03:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:11,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:11,286 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:11,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:11,486 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:11,487 INFO L82 PathProgramCache]: Analyzing trace with hash 323051882, now seen corresponding path program 96 times [2021-08-06 20:03:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:11,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146209352] [2021-08-06 20:03:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:11,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:11,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:11,557 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:11,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146209352] [2021-08-06 20:03:11,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146209352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:11,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662604821] [2021-08-06 20:03:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:03:11,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:11,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:11,877 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:11,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 20:03:17,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:03:17,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:17,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:03:17,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:18,676 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:03:18,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:03:18,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:18,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:18,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662604821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:18,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:18,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:03:18,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100367129] [2021-08-06 20:03:18,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:03:18,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:03:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:03:18,726 INFO L87 Difference]: Start difference. First operand 1728 states and 2997 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:19,025 INFO L93 Difference]: Finished difference Result 2255 states and 3905 transitions. [2021-08-06 20:03:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:03:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:19,028 INFO L225 Difference]: With dead ends: 2255 [2021-08-06 20:03:19,028 INFO L226 Difference]: Without dead ends: 2246 [2021-08-06 20:03:19,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:03:19,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-06 20:03:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1728. [2021-08-06 20:03:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.7353792704111175) internal successors, (2997), 1727 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2997 transitions. [2021-08-06 20:03:19,057 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2997 transitions. Word has length 36 [2021-08-06 20:03:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:19,057 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2997 transitions. [2021-08-06 20:03:19,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2997 transitions. [2021-08-06 20:03:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:19,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:19,059 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:19,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 20:03:19,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 20:03:19,259 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1888708156, now seen corresponding path program 97 times [2021-08-06 20:03:19,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:19,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747824771] [2021-08-06 20:03:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:19,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:19,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:19,350 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:19,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:03:19,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:03:19,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:03:19,578 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:03:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:03:19,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:19,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747824771] [2021-08-06 20:03:19,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747824771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:19,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945254398] [2021-08-06 20:03:19,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:03:19,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:19,640 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:19,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 20:03:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:25,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:03:25,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:26,472 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:03:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:03:26,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:26,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:26,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945254398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:26,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:26,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 20:03:26,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560750179] [2021-08-06 20:03:26,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:03:26,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:03:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:03:26,522 INFO L87 Difference]: Start difference. First operand 1728 states and 2997 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:27,019 INFO L93 Difference]: Finished difference Result 2458 states and 4210 transitions. [2021-08-06 20:03:27,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:03:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:27,022 INFO L225 Difference]: With dead ends: 2458 [2021-08-06 20:03:27,022 INFO L226 Difference]: Without dead ends: 2347 [2021-08-06 20:03:27,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 654.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:03:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-08-06 20:03:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1803. [2021-08-06 20:03:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.7358490566037736) internal successors, (3128), 1802 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3128 transitions. [2021-08-06 20:03:27,038 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3128 transitions. Word has length 36 [2021-08-06 20:03:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:27,038 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3128 transitions. [2021-08-06 20:03:27,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3128 transitions. [2021-08-06 20:03:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:27,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:27,040 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:27,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 20:03:27,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:27,240 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash 932287036, now seen corresponding path program 98 times [2021-08-06 20:03:27,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:27,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765971983] [2021-08-06 20:03:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:27,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:27,302 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:27,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:27,527 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:03:27,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:03:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:27,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:27,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765971983] [2021-08-06 20:03:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765971983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:27,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499743172] [2021-08-06 20:03:27,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:03:27,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:27,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:27,633 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:27,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 20:03:33,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:03:33,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:33,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:03:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:34,606 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:03:34,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:03:34,653 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:34,653 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:34,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499743172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:34,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:34,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:03:34,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264257110] [2021-08-06 20:03:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:03:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:03:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:03:34,659 INFO L87 Difference]: Start difference. First operand 1803 states and 3128 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:34,964 INFO L93 Difference]: Finished difference Result 3214 states and 5596 transitions. [2021-08-06 20:03:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:03:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:34,967 INFO L225 Difference]: With dead ends: 3214 [2021-08-06 20:03:34,967 INFO L226 Difference]: Without dead ends: 3187 [2021-08-06 20:03:34,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:03:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-08-06 20:03:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1747. [2021-08-06 20:03:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 1.7353951890034365) internal successors, (3030), 1746 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 3030 transitions. [2021-08-06 20:03:34,984 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 3030 transitions. Word has length 36 [2021-08-06 20:03:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:34,984 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 3030 transitions. [2021-08-06 20:03:34,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 3030 transitions. [2021-08-06 20:03:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:34,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:34,986 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:35,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 20:03:35,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 20:03:35,186 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash 965104136, now seen corresponding path program 99 times [2021-08-06 20:03:35,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:35,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103871578] [2021-08-06 20:03:35,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:35,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:35,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:35,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:35,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:35,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103871578] [2021-08-06 20:03:35,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103871578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:35,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980028588] [2021-08-06 20:03:35,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:03:35,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:35,643 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:35,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 20:03:41,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:03:41,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:41,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:03:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:42,881 INFO L354 Elim1Store]: treesize reduction 372, result has 3.4 percent of original size [2021-08-06 20:03:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 105 treesize of output 69 [2021-08-06 20:03:42,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:42,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:42,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980028588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:42,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:42,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:03:42,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111271298] [2021-08-06 20:03:42,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:03:42,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:03:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:03:42,934 INFO L87 Difference]: Start difference. First operand 1747 states and 3030 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:44,593 INFO L93 Difference]: Finished difference Result 2616 states and 4517 transitions. [2021-08-06 20:03:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:03:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:44,596 INFO L225 Difference]: With dead ends: 2616 [2021-08-06 20:03:44,596 INFO L226 Difference]: Without dead ends: 2538 [2021-08-06 20:03:44,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 957.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:03:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-08-06 20:03:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 1798. [2021-08-06 20:03:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 1.7390094602114636) internal successors, (3125), 1797 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 3125 transitions. [2021-08-06 20:03:44,611 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 3125 transitions. Word has length 36 [2021-08-06 20:03:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:44,611 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 3125 transitions. [2021-08-06 20:03:44,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 3125 transitions. [2021-08-06 20:03:44,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:44,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:44,613 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:44,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 20:03:44,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:44,813 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:44,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:44,814 INFO L82 PathProgramCache]: Analyzing trace with hash -586527104, now seen corresponding path program 100 times [2021-08-06 20:03:44,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:44,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008455083] [2021-08-06 20:03:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:44,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:44,994 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:44,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:45,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:45,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008455083] [2021-08-06 20:03:45,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008455083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:45,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014718674] [2021-08-06 20:03:45,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:03:45,355 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:45,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:45,356 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:45,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 20:03:51,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:03:51,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:51,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:03:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:03:52,389 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:03:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:03:52,433 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:52,434 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:03:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:52,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014718674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:52,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:03:52,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:03:52,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751877692] [2021-08-06 20:03:52,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:03:52,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:03:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:03:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:03:52,438 INFO L87 Difference]: Start difference. First operand 1798 states and 3125 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:03:52,822 INFO L93 Difference]: Finished difference Result 2336 states and 4062 transitions. [2021-08-06 20:03:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:03:52,823 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:03:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:03:52,825 INFO L225 Difference]: With dead ends: 2336 [2021-08-06 20:03:52,825 INFO L226 Difference]: Without dead ends: 2327 [2021-08-06 20:03:52,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:03:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-08-06 20:03:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 1803. [2021-08-06 20:03:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.7391786903440623) internal successors, (3134), 1802 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3134 transitions. [2021-08-06 20:03:52,840 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3134 transitions. Word has length 36 [2021-08-06 20:03:52,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:03:52,840 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3134 transitions. [2021-08-06 20:03:52,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:03:52,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3134 transitions. [2021-08-06 20:03:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:03:52,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:03:52,842 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:03:52,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 20:03:53,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-06 20:03:53,043 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:03:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:03:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash 416413034, now seen corresponding path program 101 times [2021-08-06 20:03:53,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:03:53,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352990723] [2021-08-06 20:03:53,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:03:53,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:03:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:03:53,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:53,106 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:03:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:03:53,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:03:53,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352990723] [2021-08-06 20:03:53,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352990723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:03:53,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167866028] [2021-08-06 20:03:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:03:53,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:03:53,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:03:53,427 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:03:53,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 20:03:59,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:03:59,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:03:59,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:03:59,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:00,677 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:00,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:00,722 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:00,723 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:00,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167866028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:00,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:00,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:04:00,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554972040] [2021-08-06 20:04:00,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:04:00,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:04:00,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:04:00,728 INFO L87 Difference]: Start difference. First operand 1803 states and 3134 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:01,106 INFO L93 Difference]: Finished difference Result 2343 states and 4075 transitions. [2021-08-06 20:04:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:04:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:01,109 INFO L225 Difference]: With dead ends: 2343 [2021-08-06 20:04:01,109 INFO L226 Difference]: Without dead ends: 2334 [2021-08-06 20:04:01,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:04:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-08-06 20:04:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1803. [2021-08-06 20:04:01,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 1.7391786903440623) internal successors, (3134), 1802 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 3134 transitions. [2021-08-06 20:04:01,124 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 3134 transitions. Word has length 36 [2021-08-06 20:04:01,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:01,125 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 3134 transitions. [2021-08-06 20:04:01,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:01,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 3134 transitions. [2021-08-06 20:04:01,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:01,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:01,126 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:01,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 20:04:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:01,327 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1229308916, now seen corresponding path program 102 times [2021-08-06 20:04:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:01,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858841666] [2021-08-06 20:04:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:01,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:01,396 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:01,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:01,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:04:01,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:04:01,649 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:04:01,652 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:04:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:04:01,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:01,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858841666] [2021-08-06 20:04:01,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858841666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:01,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326987681] [2021-08-06 20:04:01,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:04:01,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:01,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:01,718 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:01,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 20:04:07,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:04:07,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:07,800 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:04:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:08,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 96.8 percent of original size [2021-08-06 20:04:08,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 96.8 percent of original size [2021-08-06 20:04:08,965 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:08,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:09,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:09,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:09,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326987681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:09,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:09,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-08-06 20:04:09,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708884865] [2021-08-06 20:04:09,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:04:09,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:04:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:04:09,016 INFO L87 Difference]: Start difference. First operand 1803 states and 3134 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:09,394 INFO L93 Difference]: Finished difference Result 2503 states and 4311 transitions. [2021-08-06 20:04:09,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:04:09,394 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:09,397 INFO L225 Difference]: With dead ends: 2503 [2021-08-06 20:04:09,397 INFO L226 Difference]: Without dead ends: 2410 [2021-08-06 20:04:09,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:04:09,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-08-06 20:04:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1875. [2021-08-06 20:04:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.7406616862326574) internal successors, (3262), 1874 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 3262 transitions. [2021-08-06 20:04:09,415 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 3262 transitions. Word has length 36 [2021-08-06 20:04:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:09,415 INFO L470 AbstractCegarLoop]: Abstraction has 1875 states and 3262 transitions. [2021-08-06 20:04:09,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 3262 transitions. [2021-08-06 20:04:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:09,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:09,417 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:09,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 20:04:09,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:09,618 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:09,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1591686276, now seen corresponding path program 103 times [2021-08-06 20:04:09,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:09,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388204021] [2021-08-06 20:04:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:09,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:09,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:09,733 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:09,976 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:04:09,979 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:04:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:10,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:10,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388204021] [2021-08-06 20:04:10,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388204021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:10,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435682027] [2021-08-06 20:04:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:04:10,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:10,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:10,087 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:10,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 20:04:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:16,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:04:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:17,519 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:17,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:17,564 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:17,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:17,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435682027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:17,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:17,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:04:17,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758555527] [2021-08-06 20:04:17,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:04:17,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:17,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:04:17,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:04:17,569 INFO L87 Difference]: Start difference. First operand 1875 states and 3262 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:17,982 INFO L93 Difference]: Finished difference Result 2860 states and 4982 transitions. [2021-08-06 20:04:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:04:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:17,985 INFO L225 Difference]: With dead ends: 2860 [2021-08-06 20:04:17,985 INFO L226 Difference]: Without dead ends: 2833 [2021-08-06 20:04:17,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:04:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-08-06 20:04:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1867. [2021-08-06 20:04:18,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.7395498392282958) internal successors, (3246), 1866 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:18,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3246 transitions. [2021-08-06 20:04:18,003 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3246 transitions. Word has length 36 [2021-08-06 20:04:18,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:18,003 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 3246 transitions. [2021-08-06 20:04:18,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3246 transitions. [2021-08-06 20:04:18,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:18,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:18,005 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:18,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 20:04:18,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-06 20:04:18,205 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:18,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1248665490, now seen corresponding path program 104 times [2021-08-06 20:04:18,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:18,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270870097] [2021-08-06 20:04:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:18,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:18,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:18,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:18,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:18,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270870097] [2021-08-06 20:04:18,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270870097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:18,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764606007] [2021-08-06 20:04:18,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:04:18,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:18,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:18,590 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:18,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 20:04:24,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:04:24,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:24,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:04:24,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:26,052 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:26,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:26,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:26,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764606007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:26,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:26,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:04:26,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087725338] [2021-08-06 20:04:26,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:04:26,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:04:26,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:04:26,103 INFO L87 Difference]: Start difference. First operand 1867 states and 3246 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:26,469 INFO L93 Difference]: Finished difference Result 2796 states and 4862 transitions. [2021-08-06 20:04:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:04:26,469 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:26,472 INFO L225 Difference]: With dead ends: 2796 [2021-08-06 20:04:26,472 INFO L226 Difference]: Without dead ends: 2769 [2021-08-06 20:04:26,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:04:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-08-06 20:04:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1880. [2021-08-06 20:04:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1879 states have (on average 1.739755188930282) internal successors, (3269), 1879 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 3269 transitions. [2021-08-06 20:04:26,488 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 3269 transitions. Word has length 36 [2021-08-06 20:04:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:26,489 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 3269 transitions. [2021-08-06 20:04:26,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 3269 transitions. [2021-08-06 20:04:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:26,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:26,490 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:26,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 20:04:26,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:26,691 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1624503376, now seen corresponding path program 105 times [2021-08-06 20:04:26,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:26,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290571037] [2021-08-06 20:04:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:26,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:26,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:26,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:27,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:27,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290571037] [2021-08-06 20:04:27,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290571037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:27,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261823193] [2021-08-06 20:04:27,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:04:27,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:27,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:27,154 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:27,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 20:04:33,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:04:33,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:33,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:04:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:34,691 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:34,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:34,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:34,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:34,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261823193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:34,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:34,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:04:34,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427721434] [2021-08-06 20:04:34,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:04:34,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:04:34,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:04:34,743 INFO L87 Difference]: Start difference. First operand 1880 states and 3269 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:35,098 INFO L93 Difference]: Finished difference Result 2709 states and 4707 transitions. [2021-08-06 20:04:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:04:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:35,101 INFO L225 Difference]: With dead ends: 2709 [2021-08-06 20:04:35,101 INFO L226 Difference]: Without dead ends: 2682 [2021-08-06 20:04:35,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:04:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-08-06 20:04:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1870. [2021-08-06 20:04:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.7394328517924023) internal successors, (3251), 1869 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 3251 transitions. [2021-08-06 20:04:35,118 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 3251 transitions. Word has length 36 [2021-08-06 20:04:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:35,118 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 3251 transitions. [2021-08-06 20:04:35,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 3251 transitions. [2021-08-06 20:04:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:35,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:35,120 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:35,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 20:04:35,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:35,320 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash 72872136, now seen corresponding path program 106 times [2021-08-06 20:04:35,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:35,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846590528] [2021-08-06 20:04:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:35,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:35,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:35,390 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:35,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:35,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846590528] [2021-08-06 20:04:35,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846590528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:35,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116159583] [2021-08-06 20:04:35,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:04:35,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:35,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:35,738 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:35,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 20:04:42,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:04:42,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:42,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:04:42,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:43,458 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:43,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:43,503 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:43,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:43,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116159583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:43,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:43,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:04:43,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038300939] [2021-08-06 20:04:43,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:04:43,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:43,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:04:43,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:04:43,509 INFO L87 Difference]: Start difference. First operand 1870 states and 3251 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:43,860 INFO L93 Difference]: Finished difference Result 2418 states and 4208 transitions. [2021-08-06 20:04:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:04:43,861 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:43,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:43,863 INFO L225 Difference]: With dead ends: 2418 [2021-08-06 20:04:43,863 INFO L226 Difference]: Without dead ends: 2409 [2021-08-06 20:04:43,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:04:43,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2021-08-06 20:04:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 1877. [2021-08-06 20:04:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 1.7398720682302773) internal successors, (3264), 1876 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3264 transitions. [2021-08-06 20:04:43,879 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3264 transitions. Word has length 36 [2021-08-06 20:04:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3264 transitions. [2021-08-06 20:04:43,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3264 transitions. [2021-08-06 20:04:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:43,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:43,880 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:43,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 20:04:44,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:44,089 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:44,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:44,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1075812274, now seen corresponding path program 107 times [2021-08-06 20:04:44,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:44,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506870900] [2021-08-06 20:04:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:44,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:44,163 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:44,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:44,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:44,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506870900] [2021-08-06 20:04:44,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506870900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:44,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457854552] [2021-08-06 20:04:44,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:04:44,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:44,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:44,501 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:44,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 20:04:50,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:04:50,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:50,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:04:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:04:52,188 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:04:52,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:04:52,237 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:52,237 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:04:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457854552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:52,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:04:52,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:04:52,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821352539] [2021-08-06 20:04:52,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:04:52,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:04:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:04:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:04:52,243 INFO L87 Difference]: Start difference. First operand 1877 states and 3264 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:04:52,721 INFO L93 Difference]: Finished difference Result 2425 states and 4221 transitions. [2021-08-06 20:04:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:04:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:04:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:04:52,724 INFO L225 Difference]: With dead ends: 2425 [2021-08-06 20:04:52,724 INFO L226 Difference]: Without dead ends: 2416 [2021-08-06 20:04:52,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 646.5ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:04:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-08-06 20:04:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1877. [2021-08-06 20:04:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 1.7398720682302773) internal successors, (3264), 1876 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3264 transitions. [2021-08-06 20:04:52,739 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3264 transitions. Word has length 36 [2021-08-06 20:04:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:04:52,739 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3264 transitions. [2021-08-06 20:04:52,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:04:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3264 transitions. [2021-08-06 20:04:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:04:52,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:04:52,741 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:04:52,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 20:04:52,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 20:04:52,942 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:04:52,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:04:52,942 INFO L82 PathProgramCache]: Analyzing trace with hash 311842346, now seen corresponding path program 108 times [2021-08-06 20:04:52,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:04:52,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25213815] [2021-08-06 20:04:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:04:52,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:04:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:04:53,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:53,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 27, result has 37.2 percent of original size [2021-08-06 20:04:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:04:53,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:04:53,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25213815] [2021-08-06 20:04:53,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25213815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:04:53,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579965743] [2021-08-06 20:04:53,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:04:53,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:04:53,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:04:53,357 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:04:53,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 20:04:59,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:04:59,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:04:59,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:04:59,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:01,176 INFO L354 Elim1Store]: treesize reduction 388, result has 3.2 percent of original size [2021-08-06 20:05:01,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 55 [2021-08-06 20:05:01,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:01,221 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:01,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579965743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:01,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:01,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:05:01,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972248036] [2021-08-06 20:05:01,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:05:01,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:05:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:05:01,226 INFO L87 Difference]: Start difference. First operand 1877 states and 3264 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:01,596 INFO L93 Difference]: Finished difference Result 2369 states and 4125 transitions. [2021-08-06 20:05:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:05:01,597 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:01,599 INFO L225 Difference]: With dead ends: 2369 [2021-08-06 20:05:01,599 INFO L226 Difference]: Without dead ends: 2360 [2021-08-06 20:05:01,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 645.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:05:01,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2360 states. [2021-08-06 20:05:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2360 to 1886. [2021-08-06 20:05:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 1.7395225464190982) internal successors, (3279), 1885 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3279 transitions. [2021-08-06 20:05:01,615 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3279 transitions. Word has length 36 [2021-08-06 20:05:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:01,616 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 3279 transitions. [2021-08-06 20:05:01,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3279 transitions. [2021-08-06 20:05:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:01,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:01,617 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:01,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 20:05:01,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 20:05:01,818 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash -268095130, now seen corresponding path program 109 times [2021-08-06 20:05:01,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:01,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146623924] [2021-08-06 20:05:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:01,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:02,011 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:02,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:02,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 20:05:02,054 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 66.7 percent of original size [2021-08-06 20:05:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:05:02,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:02,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146623924] [2021-08-06 20:05:02,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146623924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:02,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451172526] [2021-08-06 20:05:02,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:05:02,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:02,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:02,276 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:02,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 20:05:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:08,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:05:08,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:09,920 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:05:09,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:05:09,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:09,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:09,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451172526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:09,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:09,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-08-06 20:05:09,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747102932] [2021-08-06 20:05:09,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:05:09,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:05:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:05:09,993 INFO L87 Difference]: Start difference. First operand 1886 states and 3279 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:10,535 INFO L93 Difference]: Finished difference Result 3761 states and 6565 transitions. [2021-08-06 20:05:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:05:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:10,539 INFO L225 Difference]: With dead ends: 3761 [2021-08-06 20:05:10,539 INFO L226 Difference]: Without dead ends: 3743 [2021-08-06 20:05:10,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 766.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:05:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-08-06 20:05:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 1916. [2021-08-06 20:05:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 1.7383812010443864) internal successors, (3329), 1915 states have internal predecessors, (3329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:10,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 3329 transitions. [2021-08-06 20:05:10,559 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 3329 transitions. Word has length 36 [2021-08-06 20:05:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:10,559 INFO L470 AbstractCegarLoop]: Abstraction has 1916 states and 3329 transitions. [2021-08-06 20:05:10,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 3329 transitions. [2021-08-06 20:05:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:10,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:10,561 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:10,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 20:05:10,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 20:05:10,777 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:10,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash 327676894, now seen corresponding path program 110 times [2021-08-06 20:05:10,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:10,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9256817] [2021-08-06 20:05:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:10,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:10,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:10,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:11,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:11,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9256817] [2021-08-06 20:05:11,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9256817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:11,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057737302] [2021-08-06 20:05:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:05:11,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:11,238 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:11,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 20:05:17,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:05:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:17,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:05:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:18,948 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:05:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:05:19,015 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:19,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:19,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057737302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:19,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:19,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:05:19,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783324012] [2021-08-06 20:05:19,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:05:19,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:19,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:05:19,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:05:19,020 INFO L87 Difference]: Start difference. First operand 1916 states and 3329 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:19,671 INFO L93 Difference]: Finished difference Result 3588 states and 6260 transitions. [2021-08-06 20:05:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:05:19,671 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:19,675 INFO L225 Difference]: With dead ends: 3588 [2021-08-06 20:05:19,675 INFO L226 Difference]: Without dead ends: 3570 [2021-08-06 20:05:19,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 764.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:05:19,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2021-08-06 20:05:19,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 1946. [2021-08-06 20:05:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 1.7424164524421595) internal successors, (3389), 1945 states have internal predecessors, (3389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:19,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 3389 transitions. [2021-08-06 20:05:19,695 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 3389 transitions. Word has length 36 [2021-08-06 20:05:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:19,695 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 3389 transitions. [2021-08-06 20:05:19,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 3389 transitions. [2021-08-06 20:05:19,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:19,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:19,697 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:19,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 20:05:19,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 20:05:19,912 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:19,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:19,913 INFO L82 PathProgramCache]: Analyzing trace with hash 216631334, now seen corresponding path program 111 times [2021-08-06 20:05:19,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:19,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564740844] [2021-08-06 20:05:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:19,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:20,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:20,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:20,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:20,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564740844] [2021-08-06 20:05:20,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564740844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:20,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240743098] [2021-08-06 20:05:20,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:05:20,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:20,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:20,335 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:20,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 20:05:27,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:05:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:27,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:05:27,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:28,194 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:05:28,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:05:28,267 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:28,268 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:28,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240743098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:28,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:28,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:05:28,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842730365] [2021-08-06 20:05:28,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:05:28,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:05:28,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:05:28,273 INFO L87 Difference]: Start difference. First operand 1946 states and 3389 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:28,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:28,935 INFO L93 Difference]: Finished difference Result 3535 states and 6161 transitions. [2021-08-06 20:05:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:05:28,935 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:28,939 INFO L225 Difference]: With dead ends: 3535 [2021-08-06 20:05:28,939 INFO L226 Difference]: Without dead ends: 3517 [2021-08-06 20:05:28,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:05:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3517 states. [2021-08-06 20:05:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3517 to 1986. [2021-08-06 20:05:28,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 1.7445843828715366) internal successors, (3463), 1985 states have internal predecessors, (3463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:28,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 3463 transitions. [2021-08-06 20:05:28,959 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 3463 transitions. Word has length 36 [2021-08-06 20:05:28,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:28,959 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 3463 transitions. [2021-08-06 20:05:28,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 3463 transitions. [2021-08-06 20:05:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:28,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:28,961 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:28,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 20:05:29,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:29,162 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1334999906, now seen corresponding path program 112 times [2021-08-06 20:05:29,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:29,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303614983] [2021-08-06 20:05:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:29,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:29,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:29,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 69.6 percent of original size [2021-08-06 20:05:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:29,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:29,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303614983] [2021-08-06 20:05:29,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303614983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:29,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098667268] [2021-08-06 20:05:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:05:29,572 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:29,573 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:29,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 20:05:36,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:05:36,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:36,501 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:05:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:37,644 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:05:37,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:05:37,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:37,713 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:37,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098667268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:37,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:37,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-08-06 20:05:37,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327395405] [2021-08-06 20:05:37,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:05:37,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:05:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:05:37,718 INFO L87 Difference]: Start difference. First operand 1986 states and 3463 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:38,394 INFO L93 Difference]: Finished difference Result 3435 states and 5997 transitions. [2021-08-06 20:05:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:05:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:38,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:38,399 INFO L225 Difference]: With dead ends: 3435 [2021-08-06 20:05:38,399 INFO L226 Difference]: Without dead ends: 3408 [2021-08-06 20:05:38,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:05:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-08-06 20:05:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 1981. [2021-08-06 20:05:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.7444444444444445) internal successors, (3454), 1980 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3454 transitions. [2021-08-06 20:05:38,418 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3454 transitions. Word has length 36 [2021-08-06 20:05:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:38,419 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3454 transitions. [2021-08-06 20:05:38,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3454 transitions. [2021-08-06 20:05:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:38,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:38,420 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:38,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 20:05:38,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:38,621 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:38,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:38,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1607652360, now seen corresponding path program 113 times [2021-08-06 20:05:38,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:38,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569960204] [2021-08-06 20:05:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:38,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:39,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569960204] [2021-08-06 20:05:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569960204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164584462] [2021-08-06 20:05:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:05:39,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:39,012 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:39,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 20:05:45,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:05:45,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:45,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:05:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:47,076 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:05:47,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:05:47,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:47,121 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:47,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164584462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:47,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:47,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:05:47,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398173687] [2021-08-06 20:05:47,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:05:47,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:05:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:05:47,126 INFO L87 Difference]: Start difference. First operand 1981 states and 3454 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:47,699 INFO L93 Difference]: Finished difference Result 3164 states and 5461 transitions. [2021-08-06 20:05:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:05:47,700 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:47,703 INFO L225 Difference]: With dead ends: 3164 [2021-08-06 20:05:47,703 INFO L226 Difference]: Without dead ends: 3068 [2021-08-06 20:05:47,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 631.6ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:05:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-08-06 20:05:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 2039. [2021-08-06 20:05:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 1.747791952894995) internal successors, (3562), 2038 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 3562 transitions. [2021-08-06 20:05:47,727 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 3562 transitions. Word has length 36 [2021-08-06 20:05:47,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:47,728 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 3562 transitions. [2021-08-06 20:05:47,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:47,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 3562 transitions. [2021-08-06 20:05:47,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:47,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:47,730 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:47,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 20:05:47,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-06 20:05:47,942 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:47,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:47,942 INFO L82 PathProgramCache]: Analyzing trace with hash 698073374, now seen corresponding path program 114 times [2021-08-06 20:05:47,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:47,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90132279] [2021-08-06 20:05:47,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:47,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:48,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:48,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90132279] [2021-08-06 20:05:48,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90132279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:48,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10606333] [2021-08-06 20:05:48,334 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:05:48,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:48,335 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:48,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 20:05:55,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:05:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:05:55,328 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-06 20:05:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:05:56,754 INFO L354 Elim1Store]: treesize reduction 285, result has 3.4 percent of original size [2021-08-06 20:05:56,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 66 [2021-08-06 20:05:56,798 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:56,799 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:05:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:56,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10606333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:56,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:05:56,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:05:56,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045416929] [2021-08-06 20:05:56,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:05:56,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:05:56,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:05:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:05:56,804 INFO L87 Difference]: Start difference. First operand 2039 states and 3562 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:05:58,121 INFO L93 Difference]: Finished difference Result 3219 states and 5588 transitions. [2021-08-06 20:05:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:05:58,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:05:58,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:05:58,124 INFO L225 Difference]: With dead ends: 3219 [2021-08-06 20:05:58,124 INFO L226 Difference]: Without dead ends: 3135 [2021-08-06 20:05:58,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 924.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:05:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-08-06 20:05:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2070. [2021-08-06 20:05:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 1.7481875302078298) internal successors, (3617), 2069 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3617 transitions. [2021-08-06 20:05:58,142 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3617 transitions. Word has length 36 [2021-08-06 20:05:58,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:05:58,142 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3617 transitions. [2021-08-06 20:05:58,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:05:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3617 transitions. [2021-08-06 20:05:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:05:58,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:05:58,144 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:05:58,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 20:05:58,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:58,345 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:05:58,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:05:58,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1701013512, now seen corresponding path program 115 times [2021-08-06 20:05:58,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:05:58,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870671098] [2021-08-06 20:05:58,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:05:58,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:05:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:05:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:05:58,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:05:58,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870671098] [2021-08-06 20:05:58,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870671098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:05:58,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010639473] [2021-08-06 20:05:58,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:05:58,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:05:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:05:58,758 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:05:58,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 20:06:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:05,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:06:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:06,973 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:06:06,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:06:07,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:07,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:07,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010639473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:07,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:07,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:06:07,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169362255] [2021-08-06 20:06:07,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:07,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:07,024 INFO L87 Difference]: Start difference. First operand 2070 states and 3617 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:07,451 INFO L93 Difference]: Finished difference Result 3009 states and 5253 transitions. [2021-08-06 20:06:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:06:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:06:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:07,454 INFO L225 Difference]: With dead ends: 3009 [2021-08-06 20:06:07,454 INFO L226 Difference]: Without dead ends: 3000 [2021-08-06 20:06:07,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-08-06 20:06:07,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2070. [2021-08-06 20:06:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 2069 states have (on average 1.7481875302078298) internal successors, (3617), 2069 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3617 transitions. [2021-08-06 20:06:07,473 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3617 transitions. Word has length 36 [2021-08-06 20:06:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:07,473 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3617 transitions. [2021-08-06 20:06:07,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:07,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3617 transitions. [2021-08-06 20:06:07,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:06:07,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:07,475 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:07,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 20:06:07,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:07,701 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:07,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2101850466, now seen corresponding path program 116 times [2021-08-06 20:06:07,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:07,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963428114] [2021-08-06 20:06:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:07,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:07,898 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:06:07,901 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:06:07,925 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 39.1 percent of original size [2021-08-06 20:06:07,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 39.1 percent of original size [2021-08-06 20:06:07,972 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:06:07,975 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:06:07,998 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:06:08,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:06:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:06:08,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:08,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963428114] [2021-08-06 20:06:08,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963428114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:08,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744831422] [2021-08-06 20:06:08,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:06:08,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:08,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:08,061 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:08,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 20:06:15,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:06:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:15,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:06:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:16,294 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:06:16,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:06:16,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:16,346 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:16,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744831422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:16,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:16,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-08-06 20:06:16,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467834488] [2021-08-06 20:06:16,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:06:16,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:06:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:06:16,352 INFO L87 Difference]: Start difference. First operand 2070 states and 3617 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:16,794 INFO L93 Difference]: Finished difference Result 2933 states and 5057 transitions. [2021-08-06 20:06:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:06:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:06:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:16,798 INFO L225 Difference]: With dead ends: 2933 [2021-08-06 20:06:16,798 INFO L226 Difference]: Without dead ends: 2828 [2021-08-06 20:06:16,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2021-08-06 20:06:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2186. [2021-08-06 20:06:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2186 states, 2185 states have (on average 1.7459954233409611) internal successors, (3815), 2185 states have internal predecessors, (3815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2186 states to 2186 states and 3815 transitions. [2021-08-06 20:06:16,817 INFO L78 Accepts]: Start accepts. Automaton has 2186 states and 3815 transitions. Word has length 36 [2021-08-06 20:06:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:16,817 INFO L470 AbstractCegarLoop]: Abstraction has 2186 states and 3815 transitions. [2021-08-06 20:06:16,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:16,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2186 states and 3815 transitions. [2021-08-06 20:06:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:06:16,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:16,819 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:16,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 20:06:17,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-08-06 20:06:17,020 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1611736004, now seen corresponding path program 117 times [2021-08-06 20:06:17,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:17,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354055895] [2021-08-06 20:06:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:17,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:17,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:06:17,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:06:17,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:06:17,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:06:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:06:17,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:17,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354055895] [2021-08-06 20:06:17,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354055895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:17,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099495074] [2021-08-06 20:06:17,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:06:17,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:17,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:17,381 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:17,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 20:06:24,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:06:24,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:24,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:06:24,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:25,681 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:06:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:06:25,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:25,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:25,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099495074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:25,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:25,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-08-06 20:06:25,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007242099] [2021-08-06 20:06:25,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:06:25,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:25,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:06:25,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:06:25,732 INFO L87 Difference]: Start difference. First operand 2186 states and 3815 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:26,230 INFO L93 Difference]: Finished difference Result 3003 states and 5197 transitions. [2021-08-06 20:06:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:06:26,230 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:06:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:26,233 INFO L225 Difference]: With dead ends: 3003 [2021-08-06 20:06:26,233 INFO L226 Difference]: Without dead ends: 2904 [2021-08-06 20:06:26,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 627.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:06:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-08-06 20:06:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2083. [2021-08-06 20:06:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 1.7483189241114314) internal successors, (3640), 2082 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3640 transitions. [2021-08-06 20:06:26,252 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3640 transitions. Word has length 36 [2021-08-06 20:06:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:26,252 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 3640 transitions. [2021-08-06 20:06:26,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3640 transitions. [2021-08-06 20:06:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:06:26,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:26,254 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:26,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:26,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 20:06:26,457 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1381050240, now seen corresponding path program 118 times [2021-08-06 20:06:26,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:26,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248122394] [2021-08-06 20:06:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:26,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:26,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:26,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248122394] [2021-08-06 20:06:26,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248122394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:26,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156732650] [2021-08-06 20:06:26,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:06:26,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:26,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:26,883 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:26,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 20:06:34,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:06:34,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:34,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:06:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:35,408 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:06:35,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:06:35,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:35,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:35,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156732650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:35,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:35,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:06:35,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587280378] [2021-08-06 20:06:35,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:35,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:35,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:35,459 INFO L87 Difference]: Start difference. First operand 2083 states and 3640 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:35,919 INFO L93 Difference]: Finished difference Result 2964 states and 5170 transitions. [2021-08-06 20:06:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:06:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:06:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:35,923 INFO L225 Difference]: With dead ends: 2964 [2021-08-06 20:06:35,923 INFO L226 Difference]: Without dead ends: 2937 [2021-08-06 20:06:35,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2937 states. [2021-08-06 20:06:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2937 to 2083. [2021-08-06 20:06:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2083 states, 2082 states have (on average 1.7483189241114314) internal successors, (3640), 2082 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3640 transitions. [2021-08-06 20:06:35,946 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3640 transitions. Word has length 36 [2021-08-06 20:06:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:35,947 INFO L470 AbstractCegarLoop]: Abstraction has 2083 states and 3640 transitions. [2021-08-06 20:06:35,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3640 transitions. [2021-08-06 20:06:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:06:35,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:35,949 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:35,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:36,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 20:06:36,149 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:36,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:36,150 INFO L82 PathProgramCache]: Analyzing trace with hash 2004338070, now seen corresponding path program 119 times [2021-08-06 20:06:36,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:36,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590742607] [2021-08-06 20:06:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:36,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:36,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:36,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590742607] [2021-08-06 20:06:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590742607] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:36,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189725212] [2021-08-06 20:06:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:06:36,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:36,673 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:36,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 20:06:44,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 20:06:44,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:44,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-06 20:06:44,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:45,228 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:06:45,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:06:45,274 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:45,275 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:45,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189725212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:45,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:45,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:06:45,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3784195] [2021-08-06 20:06:45,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:45,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:45,279 INFO L87 Difference]: Start difference. First operand 2083 states and 3640 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:45,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:45,775 INFO L93 Difference]: Finished difference Result 3102 states and 5387 transitions. [2021-08-06 20:06:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:06:45,775 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:06:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:45,778 INFO L225 Difference]: With dead ends: 3102 [2021-08-06 20:06:45,778 INFO L226 Difference]: Without dead ends: 3012 [2021-08-06 20:06:45,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-08-06 20:06:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2125. [2021-08-06 20:06:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 1.7504708097928436) internal successors, (3718), 2124 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3718 transitions. [2021-08-06 20:06:45,798 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3718 transitions. Word has length 36 [2021-08-06 20:06:45,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:45,798 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 3718 transitions. [2021-08-06 20:06:45,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3718 transitions. [2021-08-06 20:06:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:06:45,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:45,800 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:45,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 20:06:46,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 20:06:46,021 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1287689088, now seen corresponding path program 120 times [2021-08-06 20:06:46,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:46,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160024156] [2021-08-06 20:06:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:46,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:46,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:46,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160024156] [2021-08-06 20:06:46,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160024156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:46,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906392520] [2021-08-06 20:06:46,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:06:46,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:46,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:46,433 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:46,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 20:06:53,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:06:53,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:06:53,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:06:53,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:06:55,087 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:06:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:06:55,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:55,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:06:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:55,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906392520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:55,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:06:55,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:06:55,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851241662] [2021-08-06 20:06:55,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:06:55,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:06:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:06:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:06:55,136 INFO L87 Difference]: Start difference. First operand 2125 states and 3718 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:06:55,814 INFO L93 Difference]: Finished difference Result 2882 states and 5032 transitions. [2021-08-06 20:06:55,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:06:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:06:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:06:55,818 INFO L225 Difference]: With dead ends: 2882 [2021-08-06 20:06:55,818 INFO L226 Difference]: Without dead ends: 2873 [2021-08-06 20:06:55,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 646.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:06:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-08-06 20:06:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2125. [2021-08-06 20:06:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2125 states, 2124 states have (on average 1.7504708097928436) internal successors, (3718), 2124 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:55,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 3718 transitions. [2021-08-06 20:06:55,836 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 3718 transitions. Word has length 36 [2021-08-06 20:06:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:06:55,836 INFO L470 AbstractCegarLoop]: Abstraction has 2125 states and 3718 transitions. [2021-08-06 20:06:55,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:06:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 3718 transitions. [2021-08-06 20:06:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:06:55,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:06:55,837 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:06:55,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 20:06:56,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:56,038 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:06:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:06:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1631229986, now seen corresponding path program 121 times [2021-08-06 20:06:56,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:06:56,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190359511] [2021-08-06 20:06:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:06:56,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:06:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:06:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:06:56,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:06:56,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190359511] [2021-08-06 20:06:56,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190359511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:06:56,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654117188] [2021-08-06 20:06:56,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:06:56,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:06:56,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:06:56,446 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:06:56,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 20:07:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:03,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:07:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:05,094 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:07:05,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:07:05,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:05,139 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:05,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654117188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:05,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:05,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:07:05,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541882114] [2021-08-06 20:07:05,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:07:05,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:07:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:07:05,144 INFO L87 Difference]: Start difference. First operand 2125 states and 3718 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:05,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:05,598 INFO L93 Difference]: Finished difference Result 2948 states and 5145 transitions. [2021-08-06 20:07:05,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:07:05,599 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:07:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:05,601 INFO L225 Difference]: With dead ends: 2948 [2021-08-06 20:07:05,602 INFO L226 Difference]: Without dead ends: 2930 [2021-08-06 20:07:05,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:07:05,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-08-06 20:07:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2121. [2021-08-06 20:07:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 1.75) internal successors, (3710), 2120 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 3710 transitions. [2021-08-06 20:07:05,620 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 3710 transitions. Word has length 36 [2021-08-06 20:07:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:05,621 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 3710 transitions. [2021-08-06 20:07:05,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 3710 transitions. [2021-08-06 20:07:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:07:05,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:05,622 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:05,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 20:07:05,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:05,824 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:05,824 INFO L82 PathProgramCache]: Analyzing trace with hash -628289848, now seen corresponding path program 122 times [2021-08-06 20:07:05,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:05,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423309571] [2021-08-06 20:07:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:05,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:06,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:06,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423309571] [2021-08-06 20:07:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423309571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:06,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207999929] [2021-08-06 20:07:06,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:07:06,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:06,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:06,238 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:06,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 20:07:13,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:07:13,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:13,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:07:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:14,985 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:07:14,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:07:15,030 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:15,031 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:15,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207999929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:15,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:15,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:07:15,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252782991] [2021-08-06 20:07:15,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:07:15,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:15,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:07:15,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:07:15,036 INFO L87 Difference]: Start difference. First operand 2121 states and 3710 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:15,648 INFO L93 Difference]: Finished difference Result 2881 states and 5029 transitions. [2021-08-06 20:07:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:07:15,649 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:07:15,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:15,652 INFO L225 Difference]: With dead ends: 2881 [2021-08-06 20:07:15,652 INFO L226 Difference]: Without dead ends: 2872 [2021-08-06 20:07:15,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 653.4ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:07:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2021-08-06 20:07:15,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2119. [2021-08-06 20:07:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 1.7497639282341833) internal successors, (3706), 2118 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:15,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3706 transitions. [2021-08-06 20:07:15,670 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3706 transitions. Word has length 36 [2021-08-06 20:07:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:15,670 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 3706 transitions. [2021-08-06 20:07:15,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3706 transitions. [2021-08-06 20:07:15,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:07:15,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:15,671 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:15,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 20:07:15,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 20:07:15,873 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1392259776, now seen corresponding path program 123 times [2021-08-06 20:07:15,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:15,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948572519] [2021-08-06 20:07:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:15,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:16,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:16,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948572519] [2021-08-06 20:07:16,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948572519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:16,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968594718] [2021-08-06 20:07:16,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:07:16,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:16,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:16,325 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:16,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 20:07:23,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 20:07:23,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:23,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:07:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:25,070 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:07:25,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:07:25,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:25,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:25,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968594718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:25,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:25,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-08-06 20:07:25,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417702251] [2021-08-06 20:07:25,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 20:07:25,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 20:07:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:07:25,120 INFO L87 Difference]: Start difference. First operand 2119 states and 3706 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:25,680 INFO L93 Difference]: Finished difference Result 2885 states and 5037 transitions. [2021-08-06 20:07:25,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:07:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:07:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:25,683 INFO L225 Difference]: With dead ends: 2885 [2021-08-06 20:07:25,683 INFO L226 Difference]: Without dead ends: 2876 [2021-08-06 20:07:25,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:07:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-08-06 20:07:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2116. [2021-08-06 20:07:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 1.7498817966903073) internal successors, (3701), 2115 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3701 transitions. [2021-08-06 20:07:25,702 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3701 transitions. Word has length 36 [2021-08-06 20:07:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:25,702 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 3701 transitions. [2021-08-06 20:07:25,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3701 transitions. [2021-08-06 20:07:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:07:25,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:25,704 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:25,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 20:07:25,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 20:07:25,905 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:25,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:25,905 INFO L82 PathProgramCache]: Analyzing trace with hash -301503608, now seen corresponding path program 124 times [2021-08-06 20:07:25,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:25,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361350593] [2021-08-06 20:07:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:25,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:26,105 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:07:26,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:07:26,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 39.1 percent of original size [2021-08-06 20:07:26,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 39.1 percent of original size [2021-08-06 20:07:26,179 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:07:26,182 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:07:26,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:07:26,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:07:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:07:26,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:26,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361350593] [2021-08-06 20:07:26,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361350593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:26,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979319773] [2021-08-06 20:07:26,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:07:26,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:26,269 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:26,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 20:07:33,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:07:33,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:33,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:07:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:35,006 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-06 20:07:35,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-06 20:07:35,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:35,053 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:35,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979319773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:35,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:35,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-06 20:07:35,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818052934] [2021-08-06 20:07:35,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:07:35,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:35,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:07:35,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:07:35,058 INFO L87 Difference]: Start difference. First operand 2116 states and 3701 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:35,592 INFO L93 Difference]: Finished difference Result 2815 states and 4881 transitions. [2021-08-06 20:07:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:07:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:07:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:35,595 INFO L225 Difference]: With dead ends: 2815 [2021-08-06 20:07:35,595 INFO L226 Difference]: Without dead ends: 2728 [2021-08-06 20:07:35,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:07:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-08-06 20:07:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2177. [2021-08-06 20:07:35,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 1.7490808823529411) internal successors, (3806), 2176 states have internal predecessors, (3806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 3806 transitions. [2021-08-06 20:07:35,614 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 3806 transitions. Word has length 36 [2021-08-06 20:07:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:35,614 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 3806 transitions. [2021-08-06 20:07:35,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 3806 transitions. [2021-08-06 20:07:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:07:35,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:35,616 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:35,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 20:07:35,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 20:07:35,817 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:35,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:35,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1311673904, now seen corresponding path program 125 times [2021-08-06 20:07:35,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:35,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411976444] [2021-08-06 20:07:35,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:35,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:36,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:07:36,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 42.9 percent of original size [2021-08-06 20:07:36,093 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:07:36,095 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:07:36,120 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:07:36,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:07:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:07:36,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:36,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411976444] [2021-08-06 20:07:36,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411976444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:36,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213782031] [2021-08-06 20:07:36,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:07:36,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:36,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:36,189 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:36,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 20:07:44,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 20:07:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:44,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:07:44,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:45,104 INFO L354 Elim1Store]: treesize reduction 489, result has 3.2 percent of original size [2021-08-06 20:07:45,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 74 treesize of output 53 [2021-08-06 20:07:45,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:45,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:45,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213782031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:45,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:45,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-08-06 20:07:45,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665465480] [2021-08-06 20:07:45,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-06 20:07:45,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-06 20:07:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:07:45,166 INFO L87 Difference]: Start difference. First operand 2177 states and 3806 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:45,960 INFO L93 Difference]: Finished difference Result 3137 states and 5397 transitions. [2021-08-06 20:07:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:07:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:07:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:45,963 INFO L225 Difference]: With dead ends: 3137 [2021-08-06 20:07:45,963 INFO L226 Difference]: Without dead ends: 3020 [2021-08-06 20:07:45,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 966.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:07:45,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3020 states. [2021-08-06 20:07:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3020 to 2326. [2021-08-06 20:07:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 1.7483870967741935) internal successors, (4065), 2325 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 4065 transitions. [2021-08-06 20:07:45,982 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 4065 transitions. Word has length 36 [2021-08-06 20:07:45,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:45,982 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 4065 transitions. [2021-08-06 20:07:45,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:45,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 4065 transitions. [2021-08-06 20:07:45,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:07:45,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:45,984 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:46,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 20:07:46,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:46,189 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash -882884434, now seen corresponding path program 126 times [2021-08-06 20:07:46,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:46,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709881181] [2021-08-06 20:07:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:46,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:46,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 64.1 percent of original size [2021-08-06 20:07:46,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 64.1 percent of original size [2021-08-06 20:07:46,516 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 20:07:46,517 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 58.8 percent of original size [2021-08-06 20:07:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:07:46,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:46,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709881181] [2021-08-06 20:07:46,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709881181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:46,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876931431] [2021-08-06 20:07:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:07:46,581 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:46,582 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:46,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 20:07:54,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 20:07:54,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:07:54,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:07:54,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:07:55,478 INFO L354 Elim1Store]: treesize reduction 299, result has 3.2 percent of original size [2021-08-06 20:07:55,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 52 [2021-08-06 20:07:55,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:55,523 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:07:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:55,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876931431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:55,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:07:55,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-08-06 20:07:55,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313888883] [2021-08-06 20:07:55,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:07:55,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:07:55,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:07:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:07:55,528 INFO L87 Difference]: Start difference. First operand 2326 states and 4065 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:07:56,033 INFO L93 Difference]: Finished difference Result 3744 states and 6496 transitions. [2021-08-06 20:07:56,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:07:56,033 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:07:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:07:56,037 INFO L225 Difference]: With dead ends: 3744 [2021-08-06 20:07:56,037 INFO L226 Difference]: Without dead ends: 3627 [2021-08-06 20:07:56,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 738.4ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:07:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3627 states. [2021-08-06 20:07:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3627 to 2671. [2021-08-06 20:07:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 2670 states have (on average 1.747565543071161) internal successors, (4666), 2670 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 4666 transitions. [2021-08-06 20:07:56,061 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 4666 transitions. Word has length 36 [2021-08-06 20:07:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:07:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 4666 transitions. [2021-08-06 20:07:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:07:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 4666 transitions. [2021-08-06 20:07:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:07:56,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:07:56,063 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:07:56,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 20:07:56,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:56,263 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:07:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:07:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 419296618, now seen corresponding path program 127 times [2021-08-06 20:07:56,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:07:56,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289348026] [2021-08-06 20:07:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:07:56,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:07:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:07:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:07:56,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:07:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289348026] [2021-08-06 20:07:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289348026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:07:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223355296] [2021-08-06 20:07:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:07:56,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:07:56,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:07:56,665 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:07:56,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 20:08:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:04,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:08:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:05,640 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-06 20:08:05,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-06 20:08:05,684 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:08:05,685 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:08:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:05,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223355296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:05,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:05,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-08-06 20:08:05,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965292273] [2021-08-06 20:08:05,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:08:05,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:08:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:08:05,689 INFO L87 Difference]: Start difference. First operand 2671 states and 4666 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:06,018 INFO L93 Difference]: Finished difference Result 3352 states and 5858 transitions. [2021-08-06 20:08:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:08:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:08:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:06,022 INFO L225 Difference]: With dead ends: 3352 [2021-08-06 20:08:06,022 INFO L226 Difference]: Without dead ends: 3307 [2021-08-06 20:08:06,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 577.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:08:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-08-06 20:08:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 2687. [2021-08-06 20:08:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 2686 states have (on average 1.748324646314222) internal successors, (4696), 2686 states have internal predecessors, (4696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4696 transitions. [2021-08-06 20:08:06,044 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4696 transitions. Word has length 36 [2021-08-06 20:08:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:06,044 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 4696 transitions. [2021-08-06 20:08:06,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4696 transitions. [2021-08-06 20:08:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:08:06,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:06,046 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:06,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:06,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-06 20:08:06,247 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:06,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:06,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1792463420, now seen corresponding path program 128 times [2021-08-06 20:08:06,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:06,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364934566] [2021-08-06 20:08:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:06,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:06,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:08:06,547 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:08:06,572 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:08:06,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 72.2 percent of original size [2021-08-06 20:08:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:08:06,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:08:06,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364934566] [2021-08-06 20:08:06,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364934566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:06,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489155046] [2021-08-06 20:08:06,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:08:06,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:08:06,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:08:06,639 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:08:06,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 20:08:14,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:08:14,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:08:14,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 20:08:14,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:08:15,754 INFO L354 Elim1Store]: treesize reduction 222, result has 3.1 percent of original size [2021-08-06 20:08:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 49 [2021-08-06 20:08:15,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:08:15,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 7.1 percent of original size [2021-08-06 20:08:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:08:15,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489155046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:08:15,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:08:15,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-08-06 20:08:15,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547468614] [2021-08-06 20:08:15,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:08:15,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:08:15,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:08:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:08:15,805 INFO L87 Difference]: Start difference. First operand 2687 states and 4696 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:16,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:08:16,409 INFO L93 Difference]: Finished difference Result 3386 states and 5850 transitions. [2021-08-06 20:08:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 20:08:16,409 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 20:08:16,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:08:16,412 INFO L225 Difference]: With dead ends: 3386 [2021-08-06 20:08:16,412 INFO L226 Difference]: Without dead ends: 3263 [2021-08-06 20:08:16,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:08:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3263 states. [2021-08-06 20:08:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3263 to 2771. [2021-08-06 20:08:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2770 states have (on average 1.7487364620938628) internal successors, (4844), 2770 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4844 transitions. [2021-08-06 20:08:16,435 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4844 transitions. Word has length 36 [2021-08-06 20:08:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:08:16,435 INFO L470 AbstractCegarLoop]: Abstraction has 2771 states and 4844 transitions. [2021-08-06 20:08:16,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:08:16,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4844 transitions. [2021-08-06 20:08:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 20:08:16,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:08:16,437 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:08:16,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 20:08:16,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 20:08:16,637 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:08:16,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:08:16,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1028531772, now seen corresponding path program 129 times [2021-08-06 20:08:16,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:08:16,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599548409] [2021-08-06 20:08:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:08:16,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:08:16,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:08:16,965 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.6 percent of original size [2021-08-06 20:08:16,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.6 percent of original size Received shutdown request... [2021-08-06 20:08:16,990 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:08:16,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-08-06 20:08:16,990 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. [2021-08-06 20:08:16,991 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:08:16,991 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:08:16,999 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:08:16,999 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:08:17,004 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:08:17 BasicIcfg [2021-08-06 20:08:17,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:08:17,005 INFO L168 Benchmark]: Toolchain (without parser) took 726312.05 ms. Allocated memory was 191.9 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 172.0 MB in the beginning and 429.2 MB in the end (delta: -257.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-08-06 20:08:17,005 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.36 ms. Allocated memory is still 191.9 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:08:17,005 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.12 ms. Allocated memory is still 191.9 MB. Free memory was 172.0 MB in the beginning and 170.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:08:17,005 INFO L168 Benchmark]: Boogie Preprocessor took 12.67 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.6 MB in the end (delta: 909.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:08:17,005 INFO L168 Benchmark]: RCFGBuilder took 212.30 ms. Allocated memory is still 191.9 MB. Free memory was 169.5 MB in the beginning and 157.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:08:17,005 INFO L168 Benchmark]: TraceAbstraction took 726062.92 ms. Allocated memory was 191.9 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 156.7 MB in the beginning and 429.2 MB in the end (delta: -272.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-08-06 20:08:17,005 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 0.36 ms. Allocated memory is still 191.9 MB. Free memory is still 173.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.12 ms. Allocated memory is still 191.9 MB. Free memory was 172.0 MB in the beginning and 170.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.67 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.6 MB in the end (delta: 909.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 212.30 ms. Allocated memory is still 191.9 MB. Free memory was 169.5 MB in the beginning and 157.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 726062.92 ms. Allocated memory was 191.9 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 156.7 MB in the beginning and 429.2 MB in the end (delta: -272.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 39, positive: 25, positive conditional: 25, positive unconditional: 0, negative: 14, negative conditional: 14, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 27, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 27, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 27, positive: 25, positive conditional: 0, positive unconditional: 25, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 6, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 27, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 27, unknown conditional: 0, unknown unconditional: 27] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 12 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 13 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 30 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 725950.0ms, OverallIterations: 135, TraceHistogramMax: 5, EmptinessCheckTime: 149.5ms, AutomataDifference: 62843.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 52.5ms, PartialOrderReductionTime: 43.9ms, HoareTripleCheckerStatistics: 7974 SDtfs, 14160 SDslu, 96488 SDs, 0 SdLazy, 73732 SolverSat, 2692 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40332.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6584 GetRequests, 2789 SyntacticMatches, 301 SemanticMatches, 3494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25515 ImplicationChecksByTransitivity, 75481.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2771occurred in iteration=134, InterpolantAutomatonStates: 3145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1556.5ms AutomataMinimizationTime, 134 MinimizatonAttempts, 73654 StatesRemovedByMinimization, 134 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 434.9ms SsaConstructionTime, 2524.3ms SatisfiabilityAnalysisTime, 171586.5ms InterpolantComputationTime, 8608 NumberOfCodeBlocks, 8608 NumberOfCodeBlocksAsserted, 560 NumberOfCheckSat, 8344 ConstructedInterpolants, 652 QuantifiedInterpolants, 209616 SizeOfPredicates, 695 NumberOfNonLiveVariables, 10387 ConjunctsInSsa, 5724 ConjunctsInUnsatCore, 264 InterpolantComputations, 4 PerfectInterpolantSequences, 390/11124 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