/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/two-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:15:30,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:15:30,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:15:30,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 20:15:30,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:15:30,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:15:30,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:15:30,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:15:30,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:15:30,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:15:30,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:15:30,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:15:30,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:15:30,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:15:30,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:15:30,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:15:30,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 20:15:30,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:15:30,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:15:30,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:15:30,737 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 20:15:30,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:15:30,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:15:30,779 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:15:30,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:15:30,779 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:15:30,780 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:15:30,780 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:15:30,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:15:30,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:15:30,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:15:30,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:15:30,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:15:30,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:15:30,781 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:15:30,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:15:30,782 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:15:30,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:15:30,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:15:30,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:15:30,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:15:30,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:15:30,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:15:30,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:15:30,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:15:30,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:15:30,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:15:30,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:15:30,783 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:15:30,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:15:30,784 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:15:30,784 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:15:31,074 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:15:31,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:15:31,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:15:31,095 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:15:31,096 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:15:31,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl [2021-08-06 20:15:31,097 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/two-queue.wvr.bpl' [2021-08-06 20:15:31,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:15:31,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:15:31,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:15:31,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:15:31,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:15:31,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:15:31,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:15:31,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:15:31,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:15:31,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:15:31,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:15:31,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:15:31,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:15:31,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/1) ... [2021-08-06 20:15:31,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:15:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:31,213 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 20:15:31,228 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 20:15:31,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:15:31,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:15:31,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:15:31,246 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:15:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:15:31,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:15:31,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:15:31,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:15:31,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:15:31,248 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 20:15:31,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:15:31,517 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:15:31,518 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:15:31 BoogieIcfgContainer [2021-08-06 20:15:31,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:15:31,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:15:31,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:15:31,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:15:31,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:15:31" (1/2) ... [2021-08-06 20:15:31,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b2e841 and model type two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:15:31, skipping insertion in model container [2021-08-06 20:15:31,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:15:31" (2/2) ... [2021-08-06 20:15:31,524 INFO L111 eAbstractionObserver]: Analyzing ICFG two-queue.wvr.bpl [2021-08-06 20:15:31,528 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:15:31,528 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:15:31,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:15:31,545 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:15:31,599 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 20:15:31,647 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:15:31,656 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 20:15:31,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 20:15:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 52 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 20:15:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 20:15:31,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:31,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:31,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:31,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1623898766, now seen corresponding path program 1 times [2021-08-06 20:15:31,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:31,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125815882] [2021-08-06 20:15:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:31,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:31,948 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 20:15:31,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:31,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125815882] [2021-08-06 20:15:31,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125815882] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:15:31,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:15:31,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:15:31,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752944393] [2021-08-06 20:15:31,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:15:31,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:31,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:15:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:15:31,963 INFO L87 Difference]: Start difference. First operand has 53 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 52 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:31,980 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-08-06 20:15:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:15:31,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 20:15:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:31,988 INFO L225 Difference]: With dead ends: 74 [2021-08-06 20:15:31,988 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 20:15:31,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:15:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 20:15:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-08-06 20:15:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.380952380952381) internal successors, (58), 42 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 20:15:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2021-08-06 20:15:32,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 15 [2021-08-06 20:15:32,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:32,017 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2021-08-06 20:15:32,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2021-08-06 20:15:32,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:15:32,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:32,018 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:32,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:15:32,018 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:32,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:32,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1676546123, now seen corresponding path program 1 times [2021-08-06 20:15:32,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:32,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403500490] [2021-08-06 20:15:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:32,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:32,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:32,235 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:32,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:32,262 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:32,283 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 20:15:32,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:32,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403500490] [2021-08-06 20:15:32,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403500490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:32,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143775328] [2021-08-06 20:15:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:32,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:32,289 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 20:15:32,290 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 20:15:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 20:15:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:32,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-08-06 20:15:32,994 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 20:15:32,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143775328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:32,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:32,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 20:15:32,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495316575] [2021-08-06 20:15:32,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:15:32,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:32,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:15:32,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:15:32,999 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 20:15:33,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:33,489 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2021-08-06 20:15:33,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:15:33,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 19 [2021-08-06 20:15:33,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:33,492 INFO L225 Difference]: With dead ends: 81 [2021-08-06 20:15:33,492 INFO L226 Difference]: Without dead ends: 77 [2021-08-06 20:15:33,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:15:33,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-06 20:15:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-08-06 20:15:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2021-08-06 20:15:33,499 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 19 [2021-08-06 20:15:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:33,500 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2021-08-06 20:15:33,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 20:15:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2021-08-06 20:15:33,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:15:33,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:33,501 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:33,527 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 20:15:33,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:33,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1486085109, now seen corresponding path program 2 times [2021-08-06 20:15:33,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:33,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801393514] [2021-08-06 20:15:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:33,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:33,759 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 20:15:33,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:33,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801393514] [2021-08-06 20:15:33,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801393514] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:15:33,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:15:33,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 20:15:33,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344311465] [2021-08-06 20:15:33,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:15:33,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:33,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:15:33,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:15:33,761 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:33,766 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-08-06 20:15:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:15:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 20:15:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:33,767 INFO L225 Difference]: With dead ends: 50 [2021-08-06 20:15:33,767 INFO L226 Difference]: Without dead ends: 48 [2021-08-06 20:15:33,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:15:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-06 20:15:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-08-06 20:15:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 46 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 20:15:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2021-08-06 20:15:33,772 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 19 [2021-08-06 20:15:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:33,772 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2021-08-06 20:15:33,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2021-08-06 20:15:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 20:15:33,773 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:33,773 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:33,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:15:33,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash 432480181, now seen corresponding path program 3 times [2021-08-06 20:15:33,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:33,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517399068] [2021-08-06 20:15:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:33,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:33,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:33,952 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:33,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:33,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:33,993 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 20:15:33,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:33,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517399068] [2021-08-06 20:15:33,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517399068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:33,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542475341] [2021-08-06 20:15:33,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:33,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:33,997 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 20:15:33,998 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 20:15:34,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:15:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:34,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 20:15:34,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:34,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-06 20:15:34,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:15:34,561 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 20:15:34,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542475341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:34,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:34,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 20:15:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019672262] [2021-08-06 20:15:34,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:15:34,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:15:34,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:15:34,565 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 20:15:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:34,914 INFO L93 Difference]: Finished difference Result 85 states and 120 transitions. [2021-08-06 20:15:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:15:34,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 19 [2021-08-06 20:15:34,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:34,917 INFO L225 Difference]: With dead ends: 85 [2021-08-06 20:15:34,917 INFO L226 Difference]: Without dead ends: 81 [2021-08-06 20:15:34,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:15:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-06 20:15:34,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2021-08-06 20:15:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 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 20:15:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2021-08-06 20:15:34,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 19 [2021-08-06 20:15:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:34,922 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2021-08-06 20:15:34,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 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 20:15:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2021-08-06 20:15:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:15:34,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:34,923 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:34,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 20:15:35,136 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,SelfDestructingSolverStorable3 [2021-08-06 20:15:35,137 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash 764427832, now seen corresponding path program 4 times [2021-08-06 20:15:35,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:35,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483409527] [2021-08-06 20:15:35,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:35,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:35,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:35,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483409527] [2021-08-06 20:15:35,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483409527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:35,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703002510] [2021-08-06 20:15:35,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:35,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:35,187 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 20:15:35,194 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 20:15:35,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 20:15:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:35,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:35,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:15:35,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703002510] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:15:35,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 20:15:35,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-08-06 20:15:35,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107542957] [2021-08-06 20:15:35,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:15:35,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:35,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:15:35,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:15:35,413 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 20:15:35,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:35,422 INFO L93 Difference]: Finished difference Result 94 states and 128 transitions. [2021-08-06 20:15:35,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:15:35,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 23 [2021-08-06 20:15:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:35,425 INFO L225 Difference]: With dead ends: 94 [2021-08-06 20:15:35,425 INFO L226 Difference]: Without dead ends: 84 [2021-08-06 20:15:35,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:15:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-06 20:15:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-08-06 20:15:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 77 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 108 transitions. [2021-08-06 20:15:35,432 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 108 transitions. Word has length 23 [2021-08-06 20:15:35,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:35,432 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 108 transitions. [2021-08-06 20:15:35,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 20:15:35,432 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 108 transitions. [2021-08-06 20:15:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 20:15:35,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:35,433 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:35,451 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 20:15:35,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:35,641 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 708427896, now seen corresponding path program 5 times [2021-08-06 20:15:35,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:35,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218020884] [2021-08-06 20:15:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:35,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:35,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:35,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218020884] [2021-08-06 20:15:35,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218020884] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:15:35,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:15:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:15:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056177767] [2021-08-06 20:15:35,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:15:35,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:15:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:15:35,685 INFO L87 Difference]: Start difference. First operand 78 states and 108 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:35,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:35,693 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2021-08-06 20:15:35,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:15:35,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 20:15:35,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:35,695 INFO L225 Difference]: With dead ends: 163 [2021-08-06 20:15:35,695 INFO L226 Difference]: Without dead ends: 163 [2021-08-06 20:15:35,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:15:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-08-06 20:15:35,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 126. [2021-08-06 20:15:35,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.464) internal successors, (183), 125 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 183 transitions. [2021-08-06 20:15:35,707 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 183 transitions. Word has length 23 [2021-08-06 20:15:35,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:35,707 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 183 transitions. [2021-08-06 20:15:35,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:35,707 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 183 transitions. [2021-08-06 20:15:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:15:35,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:35,708 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:35,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 20:15:35,709 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash 521606523, now seen corresponding path program 6 times [2021-08-06 20:15:35,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:35,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834139105] [2021-08-06 20:15:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:35,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:35,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 75.6 percent of original size [2021-08-06 20:15:35,853 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 75.6 percent of original size [2021-08-06 20:15:35,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:15:35,885 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:15:35,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 59.7 percent of original size [2021-08-06 20:15:35,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 59.7 percent of original size [2021-08-06 20:15:35,951 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:15:35,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 58.3 percent of original size [2021-08-06 20:15:35,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 62.1 percent of original size [2021-08-06 20:15:35,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 62.1 percent of original size [2021-08-06 20:15:36,037 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 69.6 percent of original size [2021-08-06 20:15:36,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 69.6 percent of original size [2021-08-06 20:15:36,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 20, result has 61.5 percent of original size [2021-08-06 20:15:36,078 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 20, result has 61.5 percent of original size [2021-08-06 20:15:36,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 74.2 percent of original size [2021-08-06 20:15:36,093 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 74.2 percent of original size [2021-08-06 20:15:36,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 59.5 percent of original size [2021-08-06 20:15:36,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 59.5 percent of original size [2021-08-06 20:15:36,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 57.1 percent of original size [2021-08-06 20:15:36,164 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 57.1 percent of original size [2021-08-06 20:15:36,189 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 80.0 percent of original size [2021-08-06 20:15:36,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 80.0 percent of original size [2021-08-06 20:15:36,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 73.1 percent of original size [2021-08-06 20:15:36,251 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 73.1 percent of original size [2021-08-06 20:15:36,279 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:36,280 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:36,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:36,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834139105] [2021-08-06 20:15:36,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834139105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:36,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775526706] [2021-08-06 20:15:36,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:36,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:36,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:36,309 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 20:15:36,310 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 20:15:36,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:15:36,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:36,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:15:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:36,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:15:36,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:15:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:15:37,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775526706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:37,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:37,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-08-06 20:15:37,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359037069] [2021-08-06 20:15:37,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:15:37,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:37,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:15:37,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:15:37,083 INFO L87 Difference]: Start difference. First operand 126 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:38,573 INFO L93 Difference]: Finished difference Result 205 states and 294 transitions. [2021-08-06 20:15:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:15:38,573 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:15:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:38,575 INFO L225 Difference]: With dead ends: 205 [2021-08-06 20:15:38,575 INFO L226 Difference]: Without dead ends: 195 [2021-08-06 20:15:38,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1549.5ms TimeCoverageRelationStatistics Valid=409, Invalid=3497, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 20:15:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-06 20:15:38,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 136. [2021-08-06 20:15:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.474074074074074) internal successors, (199), 135 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2021-08-06 20:15:38,596 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 27 [2021-08-06 20:15:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:38,596 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2021-08-06 20:15:38,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2021-08-06 20:15:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:15:38,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:38,598 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:38,624 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 20:15:38,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:38,799 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:38,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1664334469, now seen corresponding path program 7 times [2021-08-06 20:15:38,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:38,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523047330] [2021-08-06 20:15:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:38,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:38,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:15:38,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:15:39,002 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:15:39,016 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:15:39,054 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:15:39,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:15:39,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 59.0 percent of original size [2021-08-06 20:15:39,107 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 59.0 percent of original size [2021-08-06 20:15:39,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 61.4 percent of original size [2021-08-06 20:15:39,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 61.4 percent of original size [2021-08-06 20:15:39,204 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 76.9 percent of original size [2021-08-06 20:15:39,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 76.9 percent of original size [2021-08-06 20:15:39,325 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:39,327 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:39,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:39,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:39,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:39,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523047330] [2021-08-06 20:15:39,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523047330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:39,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594770425] [2021-08-06 20:15:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:15:39,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:39,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:39,373 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 20:15:39,374 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 20:15:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:39,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:15:39,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:39,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:39,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:40,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594770425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:40,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:40,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2021-08-06 20:15:40,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481062752] [2021-08-06 20:15:40,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:15:40,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:40,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:15:40,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:15:40,046 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 20:15:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:41,014 INFO L93 Difference]: Finished difference Result 216 states and 303 transitions. [2021-08-06 20:15:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:15:41,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 27 [2021-08-06 20:15:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:41,016 INFO L225 Difference]: With dead ends: 216 [2021-08-06 20:15:41,016 INFO L226 Difference]: Without dead ends: 196 [2021-08-06 20:15:41,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1022.5ms TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:15:41,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-06 20:15:41,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 141. [2021-08-06 20:15:41,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4785714285714286) internal successors, (207), 140 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:41,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 207 transitions. [2021-08-06 20:15:41,022 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 207 transitions. Word has length 27 [2021-08-06 20:15:41,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:41,022 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 207 transitions. [2021-08-06 20:15:41,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 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 20:15:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 207 transitions. [2021-08-06 20:15:41,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:15:41,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:41,024 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:41,050 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 20:15:41,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:41,237 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 294259003, now seen corresponding path program 8 times [2021-08-06 20:15:41,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:41,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944016477] [2021-08-06 20:15:41,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:41,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:41,348 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:15:41,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 80.0 percent of original size [2021-08-06 20:15:41,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:15:41,398 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 81.5 percent of original size [2021-08-06 20:15:41,429 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 83.1 percent of original size [2021-08-06 20:15:41,444 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 83.1 percent of original size [2021-08-06 20:15:41,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 78.6 percent of original size [2021-08-06 20:15:41,489 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 78.6 percent of original size [2021-08-06 20:15:41,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 76.9 percent of original size [2021-08-06 20:15:41,535 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 76.9 percent of original size [2021-08-06 20:15:41,569 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 76.9 percent of original size [2021-08-06 20:15:41,572 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 76.9 percent of original size [2021-08-06 20:15:41,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:41,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:41,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:41,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:41,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:41,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944016477] [2021-08-06 20:15:41,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944016477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:41,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163176727] [2021-08-06 20:15:41,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:15:41,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:41,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:41,737 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 20:15:41,740 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 20:15:41,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:15:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:15:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:42,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:42,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163176727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:42,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:42,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2021-08-06 20:15:42,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151681074] [2021-08-06 20:15:42,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 20:15:42,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 20:15:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:15:42,424 INFO L87 Difference]: Start difference. First operand 141 states and 207 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 20:15:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:43,252 INFO L93 Difference]: Finished difference Result 209 states and 295 transitions. [2021-08-06 20:15:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:15:43,253 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 27 [2021-08-06 20:15:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:43,254 INFO L225 Difference]: With dead ends: 209 [2021-08-06 20:15:43,254 INFO L226 Difference]: Without dead ends: 205 [2021-08-06 20:15:43,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 878.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:15:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-06 20:15:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 152. [2021-08-06 20:15:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4768211920529801) internal successors, (223), 151 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:43,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 223 transitions. [2021-08-06 20:15:43,259 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 223 transitions. Word has length 27 [2021-08-06 20:15:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:43,259 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 223 transitions. [2021-08-06 20:15:43,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 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 20:15:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 223 transitions. [2021-08-06 20:15:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:15:43,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:43,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:43,280 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 20:15:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:43,469 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 365818261, now seen corresponding path program 9 times [2021-08-06 20:15:43,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:43,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452273014] [2021-08-06 20:15:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:43,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:43,560 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:15:43,563 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:15:43,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:15:43,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:15:43,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:43,604 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:43,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:15:43,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:15:43,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 65.0 percent of original size [2021-08-06 20:15:43,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 65.0 percent of original size [2021-08-06 20:15:43,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:43,784 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:43,808 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:43,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:43,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:43,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452273014] [2021-08-06 20:15:43,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452273014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:43,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775755412] [2021-08-06 20:15:43,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:43,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:43,836 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 20:15:43,837 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 20:15:43,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:15:43,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:43,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:15:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:44,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 20:15:44,552 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:15:44,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 20:15:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775755412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:44,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-06 20:15:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497586974] [2021-08-06 20:15:44,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 20:15:44,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 20:15:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:15:44,702 INFO L87 Difference]: Start difference. First operand 152 states and 223 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:45,720 INFO L93 Difference]: Finished difference Result 244 states and 342 transitions. [2021-08-06 20:15:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:15:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:15:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:45,722 INFO L225 Difference]: With dead ends: 244 [2021-08-06 20:15:45,722 INFO L226 Difference]: Without dead ends: 236 [2021-08-06 20:15:45,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1051.0ms TimeCoverageRelationStatistics Valid=303, Invalid=2247, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:15:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-08-06 20:15:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 182. [2021-08-06 20:15:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.4806629834254144) internal successors, (268), 181 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 268 transitions. [2021-08-06 20:15:45,728 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 268 transitions. Word has length 27 [2021-08-06 20:15:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:45,728 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 268 transitions. [2021-08-06 20:15:45,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:45,728 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 268 transitions. [2021-08-06 20:15:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:15:45,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:45,733 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:45,758 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 20:15:45,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:45,955 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1981462213, now seen corresponding path program 10 times [2021-08-06 20:15:45,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:45,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278113974] [2021-08-06 20:15:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:45,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:46,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:46,063 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:46,078 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:15:46,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:15:46,100 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 20:15:46,101 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 20:15:46,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 60.0 percent of original size [2021-08-06 20:15:46,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 60.0 percent of original size [2021-08-06 20:15:46,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 65.0 percent of original size [2021-08-06 20:15:46,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 65.0 percent of original size [2021-08-06 20:15:46,232 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:46,233 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:46,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:46,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:46,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:46,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278113974] [2021-08-06 20:15:46,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278113974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:46,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748377829] [2021-08-06 20:15:46,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:46,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:46,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:46,272 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 20:15:46,273 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 20:15:46,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:15:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:46,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:46,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:46,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748377829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:46,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:46,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-08-06 20:15:46,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296458037] [2021-08-06 20:15:46,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:15:46,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:15:46,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:15:46,898 INFO L87 Difference]: Start difference. First operand 182 states and 268 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:47,210 INFO L93 Difference]: Finished difference Result 227 states and 329 transitions. [2021-08-06 20:15:47,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:15:47,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 20:15:47,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:47,211 INFO L225 Difference]: With dead ends: 227 [2021-08-06 20:15:47,211 INFO L226 Difference]: Without dead ends: 219 [2021-08-06 20:15:47,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:15:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-08-06 20:15:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2021-08-06 20:15:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.4669811320754718) internal successors, (311), 212 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 311 transitions. [2021-08-06 20:15:47,216 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 311 transitions. Word has length 27 [2021-08-06 20:15:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:47,217 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 311 transitions. [2021-08-06 20:15:47,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 311 transitions. [2021-08-06 20:15:47,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 20:15:47,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:47,218 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:47,241 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 20:15:47,436 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,SelfDestructingSolverStorable10 [2021-08-06 20:15:47,437 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1466595643, now seen corresponding path program 11 times [2021-08-06 20:15:47,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:47,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206434049] [2021-08-06 20:15:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:47,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:47,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:47,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:47,534 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:15:47,537 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:15:47,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 20:15:47,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 62.2 percent of original size [2021-08-06 20:15:47,579 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 60.0 percent of original size [2021-08-06 20:15:47,581 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 60.0 percent of original size [2021-08-06 20:15:47,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 65.0 percent of original size [2021-08-06 20:15:47,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 65.0 percent of original size [2021-08-06 20:15:47,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:47,706 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:47,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:47,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:47,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206434049] [2021-08-06 20:15:47,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206434049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:47,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322851598] [2021-08-06 20:15:47,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:47,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:47,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:47,746 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 20:15:47,747 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 20:15:47,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:15:47,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:47,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 20:15:47,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:48,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:15:48,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322851598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:48,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:48,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-08-06 20:15:48,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908054271] [2021-08-06 20:15:48,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:15:48,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:15:48,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:15:48,460 INFO L87 Difference]: Start difference. First operand 213 states and 311 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 20:15:48,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:48,892 INFO L93 Difference]: Finished difference Result 245 states and 349 transitions. [2021-08-06 20:15:48,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:15:48,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 27 [2021-08-06 20:15:48,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:48,893 INFO L225 Difference]: With dead ends: 245 [2021-08-06 20:15:48,893 INFO L226 Difference]: Without dead ends: 237 [2021-08-06 20:15:48,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:15:48,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-06 20:15:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 190. [2021-08-06 20:15:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.4761904761904763) internal successors, (279), 189 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 279 transitions. [2021-08-06 20:15:48,898 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 279 transitions. Word has length 27 [2021-08-06 20:15:48,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:48,898 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 279 transitions. [2021-08-06 20:15:48,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 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 20:15:48,898 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 279 transitions. [2021-08-06 20:15:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:15:48,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:48,899 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:48,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-06 20:15:49,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:49,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:49,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1900796738, now seen corresponding path program 12 times [2021-08-06 20:15:49,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:49,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418827869] [2021-08-06 20:15:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:49,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:49,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:49,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418827869] [2021-08-06 20:15:49,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418827869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:49,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984571559] [2021-08-06 20:15:49,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:15:49,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:49,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:49,150 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 20:15:49,151 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 20:15:49,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:15:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:49,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:15:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:49,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:49,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:15:49,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984571559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:49,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:49,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:15:49,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091856815] [2021-08-06 20:15:49,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:15:49,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:49,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:15:49,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:15:49,579 INFO L87 Difference]: Start difference. First operand 190 states and 279 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 20:15:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:49,591 INFO L93 Difference]: Finished difference Result 260 states and 369 transitions. [2021-08-06 20:15:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:15:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 31 [2021-08-06 20:15:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:49,593 INFO L225 Difference]: With dead ends: 260 [2021-08-06 20:15:49,593 INFO L226 Difference]: Without dead ends: 250 [2021-08-06 20:15:49,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:15:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-06 20:15:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 204. [2021-08-06 20:15:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.4482758620689655) internal successors, (294), 203 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 20:15:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2021-08-06 20:15:49,598 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 31 [2021-08-06 20:15:49,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2021-08-06 20:15:49,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 20:15:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2021-08-06 20:15:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 20:15:49,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:49,599 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:49,624 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 20:15:49,812 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,SelfDestructingSolverStorable12 [2021-08-06 20:15:49,813 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:49,813 INFO L82 PathProgramCache]: Analyzing trace with hash -468130050, now seen corresponding path program 13 times [2021-08-06 20:15:49,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:49,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892189644] [2021-08-06 20:15:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:49,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:49,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:49,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892189644] [2021-08-06 20:15:49,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892189644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:49,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831086467] [2021-08-06 20:15:49,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:15:49,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:49,852 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 20:15:49,853 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 20:15:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 20:15:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:50,289 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:50,290 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 12.5 percent of original size [2021-08-06 20:15:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:50,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831086467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:50,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:50,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 20:15:50,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316732197] [2021-08-06 20:15:50,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 20:15:50,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:50,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 20:15:50,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:15:50,330 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 20:15:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:50,339 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-08-06 20:15:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:15:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 31 [2021-08-06 20:15:50,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:50,340 INFO L225 Difference]: With dead ends: 150 [2021-08-06 20:15:50,340 INFO L226 Difference]: Without dead ends: 150 [2021-08-06 20:15:50,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 20:15:50,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-08-06 20:15:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2021-08-06 20:15:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.403225806451613) internal successors, (174), 124 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2021-08-06 20:15:50,344 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 31 [2021-08-06 20:15:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:50,344 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2021-08-06 20:15:50,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 20:15:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2021-08-06 20:15:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:15:50,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:50,345 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:50,371 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 20:15:50,560 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,SelfDestructingSolverStorable13 [2021-08-06 20:15:50,561 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:50,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:50,561 INFO L82 PathProgramCache]: Analyzing trace with hash -415741695, now seen corresponding path program 14 times [2021-08-06 20:15:50,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:50,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648116380] [2021-08-06 20:15:50,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:50,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:50,727 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:50,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:50,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:15:50,750 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:15:50,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:50,767 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:50,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:15:50,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:15:50,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:50,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:50,915 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:50,916 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:50,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:50,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:15:50,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:50,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648116380] [2021-08-06 20:15:50,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648116380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:50,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526721678] [2021-08-06 20:15:50,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:15:50,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:50,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:50,963 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 20:15:50,964 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 20:15:51,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:15:51,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:15:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:51,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:51,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:15:51,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526721678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:51,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:51,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-06 20:15:51,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641593819] [2021-08-06 20:15:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:15:51,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:15:51,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:15:51,770 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 20:15:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:52,228 INFO L93 Difference]: Finished difference Result 214 states and 294 transitions. [2021-08-06 20:15:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:15:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 35 [2021-08-06 20:15:52,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:52,229 INFO L225 Difference]: With dead ends: 214 [2021-08-06 20:15:52,229 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 20:15:52,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:15:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 20:15:52,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-08-06 20:15:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.4133333333333333) internal successors, (212), 150 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:52,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 212 transitions. [2021-08-06 20:15:52,233 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 212 transitions. Word has length 35 [2021-08-06 20:15:52,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:52,234 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 212 transitions. [2021-08-06 20:15:52,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 20:15:52,234 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 212 transitions. [2021-08-06 20:15:52,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:15:52,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:52,234 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:52,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-06 20:15:52,452 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,SelfDestructingSolverStorable14 [2021-08-06 20:15:52,453 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash -117141955, now seen corresponding path program 15 times [2021-08-06 20:15:52,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:52,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955655640] [2021-08-06 20:15:52,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:52,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:52,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:52,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:52,634 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:15:52,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:15:52,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:52,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:52,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:15:52,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:15:52,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:52,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:52,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:52,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:52,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:52,881 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:52,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:52,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:52,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955655640] [2021-08-06 20:15:52,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955655640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:52,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143200889] [2021-08-06 20:15:52,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:15:52,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:52,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:52,919 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 20:15:52,940 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 20:15:53,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 20:15:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:15:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:53,741 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:15:53,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 20:15:53,954 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:15:53,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 20:15:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:54,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143200889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:54,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:54,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 20:15:54,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220427300] [2021-08-06 20:15:54,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:15:54,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:15:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:15:54,103 INFO L87 Difference]: Start difference. First operand 151 states and 212 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:55,341 INFO L93 Difference]: Finished difference Result 256 states and 341 transitions. [2021-08-06 20:15:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:15:55,341 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:15:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:55,342 INFO L225 Difference]: With dead ends: 256 [2021-08-06 20:15:55,342 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 20:15:55,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1299.1ms TimeCoverageRelationStatistics Valid=389, Invalid=2581, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:15:55,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 20:15:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 166. [2021-08-06 20:15:55,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.4181818181818182) internal successors, (234), 165 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 234 transitions. [2021-08-06 20:15:55,347 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 234 transitions. Word has length 35 [2021-08-06 20:15:55,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:55,347 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 234 transitions. [2021-08-06 20:15:55,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 234 transitions. [2021-08-06 20:15:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:15:55,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:55,348 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:55,370 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 20:15:55,561 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,SelfDestructingSolverStorable15 [2021-08-06 20:15:55,561 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1693284609, now seen corresponding path program 16 times [2021-08-06 20:15:55,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:55,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550735300] [2021-08-06 20:15:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:55,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:55,678 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:15:55,681 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:15:55,698 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:15:55,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:15:55,720 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:15:55,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:15:55,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:15:55,752 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:15:55,772 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:55,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:55,886 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:55,893 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:55,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:55,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:55,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:55,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550735300] [2021-08-06 20:15:55,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550735300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:55,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053500905] [2021-08-06 20:15:55,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:15:55,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:55,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:55,934 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 20:15:55,935 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 20:15:56,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:15:56,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:56,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:15:56,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:56,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:56,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:15:56,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053500905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:56,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:56,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-06 20:15:56,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511944886] [2021-08-06 20:15:56,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:15:56,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:56,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:15:56,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:15:56,790 INFO L87 Difference]: Start difference. First operand 166 states and 234 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 20:15:57,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:57,383 INFO L93 Difference]: Finished difference Result 229 states and 316 transitions. [2021-08-06 20:15:57,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:15:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 35 [2021-08-06 20:15:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:57,384 INFO L225 Difference]: With dead ends: 229 [2021-08-06 20:15:57,384 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 20:15:57,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:15:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 20:15:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 175. [2021-08-06 20:15:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4310344827586208) internal successors, (249), 174 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 249 transitions. [2021-08-06 20:15:57,388 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 249 transitions. Word has length 35 [2021-08-06 20:15:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:57,388 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 249 transitions. [2021-08-06 20:15:57,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 20:15:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 249 transitions. [2021-08-06 20:15:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:15:57,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:57,389 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:57,413 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 20:15:57,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:57,609 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:57,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1410571365, now seen corresponding path program 17 times [2021-08-06 20:15:57,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:57,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509684041] [2021-08-06 20:15:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:57,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:57,734 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:57,736 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:15:57,750 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:15:57,753 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:15:57,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:57,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:15:57,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:15:57,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:15:57,839 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:57,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:57,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:57,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:15:57,975 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:57,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:15:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:15:57,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:15:57,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509684041] [2021-08-06 20:15:57,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509684041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:57,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697636192] [2021-08-06 20:15:57,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:15:57,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:15:57,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:15:57,996 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 20:15:57,996 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 20:15:58,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:15:58,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:15:58,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 20:15:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:15:58,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:58,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:15:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:15:58,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697636192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:15:58,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:15:58,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-08-06 20:15:58,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671310188] [2021-08-06 20:15:58,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 20:15:58,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:15:58,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 20:15:58,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:15:58,947 INFO L87 Difference]: Start difference. First operand 175 states and 249 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 20:15:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:15:59,448 INFO L93 Difference]: Finished difference Result 265 states and 370 transitions. [2021-08-06 20:15:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:15:59,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 35 [2021-08-06 20:15:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:15:59,449 INFO L225 Difference]: With dead ends: 265 [2021-08-06 20:15:59,449 INFO L226 Difference]: Without dead ends: 257 [2021-08-06 20:15:59,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:15:59,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-08-06 20:15:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 127. [2021-08-06 20:15:59,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.4126984126984128) internal successors, (178), 126 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:15:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 178 transitions. [2021-08-06 20:15:59,453 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 178 transitions. Word has length 35 [2021-08-06 20:15:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:15:59,453 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 178 transitions. [2021-08-06 20:15:59,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 20:15:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 178 transitions. [2021-08-06 20:15:59,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:15:59,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:15:59,454 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:15:59,475 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 20:15:59,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:15:59,665 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:15:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:15:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash 399855199, now seen corresponding path program 18 times [2021-08-06 20:15:59,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:15:59,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543356489] [2021-08-06 20:15:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:15:59,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:15:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:15:59,793 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:15:59,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:15:59,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:15:59,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:15:59,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:15:59,845 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:15:59,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:15:59,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:15:59,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:15:59,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:00,024 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:00,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:00,050 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:00,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:00,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543356489] [2021-08-06 20:16:00,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543356489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783763363] [2021-08-06 20:16:00,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:00,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:00,077 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 20:16:00,107 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 20:16:00,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:16:00,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:00,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:16:00,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:00,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:00,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:01,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783763363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:01,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:01,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:01,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013383295] [2021-08-06 20:16:01,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:01,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:01,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:01,077 INFO L87 Difference]: Start difference. First operand 127 states and 178 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:01,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:01,626 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2021-08-06 20:16:01,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:16:01,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 35 [2021-08-06 20:16:01,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:01,627 INFO L225 Difference]: With dead ends: 185 [2021-08-06 20:16:01,627 INFO L226 Difference]: Without dead ends: 177 [2021-08-06 20:16:01,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 630.1ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:16:01,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-06 20:16:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 94. [2021-08-06 20:16:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 93 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:01,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-08-06 20:16:01,629 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 35 [2021-08-06 20:16:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:01,629 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-08-06 20:16:01,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2021-08-06 20:16:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:01,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:01,630 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:01,649 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 20:16:01,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:01,841 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:01,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:01,841 INFO L82 PathProgramCache]: Analyzing trace with hash -643089215, now seen corresponding path program 19 times [2021-08-06 20:16:01,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:01,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917662639] [2021-08-06 20:16:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:01,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:01,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:01,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:01,983 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:01,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:02,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:02,010 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:02,035 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:02,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:02,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:02,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:02,164 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:02,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:02,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:02,187 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:02,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:02,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917662639] [2021-08-06 20:16:02,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917662639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:02,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076740862] [2021-08-06 20:16:02,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:02,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:02,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:02,208 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 20:16:02,208 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 20:16:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:16:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:03,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:03,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076740862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:03,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:03,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:03,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836360105] [2021-08-06 20:16:03,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:03,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:03,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:03,210 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:03,883 INFO L93 Difference]: Finished difference Result 123 states and 161 transitions. [2021-08-06 20:16:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:16:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 35 [2021-08-06 20:16:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:03,884 INFO L225 Difference]: With dead ends: 123 [2021-08-06 20:16:03,884 INFO L226 Difference]: Without dead ends: 115 [2021-08-06 20:16:03,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:16:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-06 20:16:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 87. [2021-08-06 20:16:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 86 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2021-08-06 20:16:03,899 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 35 [2021-08-06 20:16:03,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:03,899 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2021-08-06 20:16:03,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:03,900 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2021-08-06 20:16:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:03,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:03,900 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:03,921 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 20:16:04,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:04,111 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:04,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:04,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1376156865, now seen corresponding path program 20 times [2021-08-06 20:16:04,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:04,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912627911] [2021-08-06 20:16:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:04,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:04,231 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:04,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:04,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:04,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:04,270 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:04,272 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:04,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:04,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:04,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:04,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:04,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:04,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:04,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:04,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:04,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:04,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912627911] [2021-08-06 20:16:04,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912627911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:04,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865655107] [2021-08-06 20:16:04,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:04,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:04,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:04,493 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 20:16:04,521 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 20:16:05,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:05,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:16:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:05,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:05,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:05,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865655107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:05,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:05,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:05,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077424134] [2021-08-06 20:16:05,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:05,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:05,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:05,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:05,603 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 20:16:06,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:06,014 INFO L93 Difference]: Finished difference Result 117 states and 152 transitions. [2021-08-06 20:16:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:16:06,015 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 35 [2021-08-06 20:16:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:06,016 INFO L225 Difference]: With dead ends: 117 [2021-08-06 20:16:06,016 INFO L226 Difference]: Without dead ends: 109 [2021-08-06 20:16:06,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-08-06 20:16:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-06 20:16:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 67. [2021-08-06 20:16:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-08-06 20:16:06,018 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 35 [2021-08-06 20:16:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:06,018 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-08-06 20:16:06,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 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 20:16:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-08-06 20:16:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:06,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:06,019 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:06,047 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 20:16:06,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:06,233 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash -262960895, now seen corresponding path program 21 times [2021-08-06 20:16:06,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:06,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010225623] [2021-08-06 20:16:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:06,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:06,352 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:16:06,354 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:16:06,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:16:06,377 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:16:06,389 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:16:06,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:16:06,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:06,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:06,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:06,440 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:06,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:06,561 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:06,584 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:06,585 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:06,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:06,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:06,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010225623] [2021-08-06 20:16:06,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010225623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:06,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165852794] [2021-08-06 20:16:06,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:16:06,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:06,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:06,605 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 20:16:06,607 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 20:16:07,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:16:07,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:07,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:16:07,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:07,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:07,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165852794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:07,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:07,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-08-06 20:16:07,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491763123] [2021-08-06 20:16:07,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 20:16:07,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 20:16:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:16:07,662 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 20:16:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:08,142 INFO L93 Difference]: Finished difference Result 173 states and 224 transitions. [2021-08-06 20:16:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:16:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 35 [2021-08-06 20:16:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:08,144 INFO L225 Difference]: With dead ends: 173 [2021-08-06 20:16:08,144 INFO L226 Difference]: Without dead ends: 165 [2021-08-06 20:16:08,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:16:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-08-06 20:16:08,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 117. [2021-08-06 20:16:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2021-08-06 20:16:08,147 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 35 [2021-08-06 20:16:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:08,147 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2021-08-06 20:16:08,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 20:16:08,147 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2021-08-06 20:16:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:08,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:08,148 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:08,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:08,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:08,369 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash 35638845, now seen corresponding path program 22 times [2021-08-06 20:16:08,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:08,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410607309] [2021-08-06 20:16:08,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:08,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:08,490 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:16:08,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:16:08,512 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:16:08,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 54.4 percent of original size [2021-08-06 20:16:08,526 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:16:08,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:16:08,551 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:16:08,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:16:08,580 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:08,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:08,693 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:08,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:08,715 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:08,715 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:08,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:08,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410607309] [2021-08-06 20:16:08,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410607309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:08,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162544011] [2021-08-06 20:16:08,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:16:08,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:08,735 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 20:16:08,736 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 20:16:09,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:16:09,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:09,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:16:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:09,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:09,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162544011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:09,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-06 20:16:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706711221] [2021-08-06 20:16:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:16:09,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:16:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:16:09,824 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 20:16:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:10,373 INFO L93 Difference]: Finished difference Result 184 states and 241 transitions. [2021-08-06 20:16:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:16:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 35 [2021-08-06 20:16:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:10,374 INFO L225 Difference]: With dead ends: 184 [2021-08-06 20:16:10,374 INFO L226 Difference]: Without dead ends: 176 [2021-08-06 20:16:10,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:16:10,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-06 20:16:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2021-08-06 20:16:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3629032258064515) internal successors, (169), 124 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 20:16:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 169 transitions. [2021-08-06 20:16:10,378 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 169 transitions. Word has length 35 [2021-08-06 20:16:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:10,378 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 169 transitions. [2021-08-06 20:16:10,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 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 20:16:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 169 transitions. [2021-08-06 20:16:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:10,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:10,379 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:10,405 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 20:16:10,579 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,SelfDestructingSolverStorable22 [2021-08-06 20:16:10,579 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1846065409, now seen corresponding path program 23 times [2021-08-06 20:16:10,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:10,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778709336] [2021-08-06 20:16:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:10,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:10,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:10,704 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:10,726 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:10,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:10,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:10,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:10,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:10,781 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:10,801 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:10,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:10,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:10,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:10,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:10,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:10,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:10,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778709336] [2021-08-06 20:16:10,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778709336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:10,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107053352] [2021-08-06 20:16:10,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:10,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:10,949 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 20:16:10,952 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 20:16:11,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:16:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 20:16:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:12,508 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:16:12,508 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 70 treesize of output 48 [2021-08-06 20:16:12,655 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 20:16:12,655 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 39 treesize of output 19 [2021-08-06 20:16:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:12,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107053352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:12,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:12,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 35 [2021-08-06 20:16:12,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369304835] [2021-08-06 20:16:12,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 20:16:12,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 20:16:12,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:16:12,776 INFO L87 Difference]: Start difference. First operand 125 states and 169 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:14,487 INFO L93 Difference]: Finished difference Result 276 states and 373 transitions. [2021-08-06 20:16:14,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 20:16:14,488 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:16:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:14,489 INFO L225 Difference]: With dead ends: 276 [2021-08-06 20:16:14,489 INFO L226 Difference]: Without dead ends: 264 [2021-08-06 20:16:14,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 1619.9ms TimeCoverageRelationStatistics Valid=424, Invalid=4688, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 20:16:14,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-06 20:16:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 180. [2021-08-06 20:16:14,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.3966480446927374) internal successors, (250), 179 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 250 transitions. [2021-08-06 20:16:14,494 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 250 transitions. Word has length 35 [2021-08-06 20:16:14,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:14,494 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 250 transitions. [2021-08-06 20:16:14,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 35 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 250 transitions. [2021-08-06 20:16:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:14,495 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:14,495 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:14,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 20:16:14,708 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,SelfDestructingSolverStorable23 [2021-08-06 20:16:14,709 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1257790565, now seen corresponding path program 24 times [2021-08-06 20:16:14,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:14,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166656446] [2021-08-06 20:16:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:14,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:14,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:16:14,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 63.2 percent of original size [2021-08-06 20:16:14,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:16:14,844 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 67.4 percent of original size [2021-08-06 20:16:14,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:16:14,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 61.3 percent of original size [2021-08-06 20:16:14,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:16:14,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 64.2 percent of original size [2021-08-06 20:16:14,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:14,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:15,037 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:15,038 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:15,059 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:15,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:15,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:15,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166656446] [2021-08-06 20:16:15,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166656446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:15,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422010301] [2021-08-06 20:16:15,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:15,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:15,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:15,086 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 20:16:15,087 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 20:16:15,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 20:16:15,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:16:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:16,203 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:16:16,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 20:16:16,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:16,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422010301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:16,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:16,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-08-06 20:16:16,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897014115] [2021-08-06 20:16:16,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:16:16,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:16:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:16:16,398 INFO L87 Difference]: Start difference. First operand 180 states and 250 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:17,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:17,222 INFO L93 Difference]: Finished difference Result 246 states and 333 transitions. [2021-08-06 20:16:17,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:16:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 20:16:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:17,224 INFO L225 Difference]: With dead ends: 246 [2021-08-06 20:16:17,224 INFO L226 Difference]: Without dead ends: 238 [2021-08-06 20:16:17,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:16:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-06 20:16:17,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 165. [2021-08-06 20:16:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.3780487804878048) internal successors, (226), 164 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 226 transitions. [2021-08-06 20:16:17,234 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 226 transitions. Word has length 35 [2021-08-06 20:16:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:17,235 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 226 transitions. [2021-08-06 20:16:17,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:17,235 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 226 transitions. [2021-08-06 20:16:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:17,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:17,236 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:17,264 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 20:16:17,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:17,461 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:17,461 INFO L82 PathProgramCache]: Analyzing trace with hash -490308415, now seen corresponding path program 25 times [2021-08-06 20:16:17,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:17,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779669134] [2021-08-06 20:16:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:17,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:17,590 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:17,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:17,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:17,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:17,641 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:17,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:17,662 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:17,664 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:17,682 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:17,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:17,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:17,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:17,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:17,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:17,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:17,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779669134] [2021-08-06 20:16:17,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779669134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:17,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558542068] [2021-08-06 20:16:17,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:17,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:17,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:17,851 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 20:16:17,851 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 20:16:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:18,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:16:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:18,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:18,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:16:19,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558542068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:19,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:19,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:19,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081460328] [2021-08-06 20:16:19,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:19,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:19,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:19,120 INFO L87 Difference]: Start difference. First operand 165 states and 226 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:19,440 INFO L93 Difference]: Finished difference Result 204 states and 273 transitions. [2021-08-06 20:16:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:16:19,440 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 35 [2021-08-06 20:16:19,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:19,441 INFO L225 Difference]: With dead ends: 204 [2021-08-06 20:16:19,441 INFO L226 Difference]: Without dead ends: 196 [2021-08-06 20:16:19,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 13 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:16:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-08-06 20:16:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 169. [2021-08-06 20:16:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.369047619047619) internal successors, (230), 168 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 230 transitions. [2021-08-06 20:16:19,444 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 230 transitions. Word has length 35 [2021-08-06 20:16:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:19,444 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 230 transitions. [2021-08-06 20:16:19,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 230 transitions. [2021-08-06 20:16:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:19,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:19,445 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:19,467 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 20:16:19,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:19,661 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:19,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:19,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1528937665, now seen corresponding path program 26 times [2021-08-06 20:16:19,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:19,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713392155] [2021-08-06 20:16:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:19,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:19,773 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:19,776 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:19,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:19,789 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:19,809 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:19,811 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:19,826 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:19,828 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:19,845 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:19,847 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:19,945 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:19,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:19,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:19,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:19,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:19,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713392155] [2021-08-06 20:16:19,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713392155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:19,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189449741] [2021-08-06 20:16:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:19,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:19,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:19,987 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 20:16:19,988 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 20:16:20,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:20,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:20,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:16:20,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:21,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:21,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:21,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189449741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:21,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:21,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-06 20:16:21,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561054085] [2021-08-06 20:16:21,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:16:21,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:16:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:16:21,230 INFO L87 Difference]: Start difference. First operand 169 states and 230 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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 20:16:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:21,628 INFO L93 Difference]: Finished difference Result 231 states and 313 transitions. [2021-08-06 20:16:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:16:21,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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 35 [2021-08-06 20:16:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:21,630 INFO L225 Difference]: With dead ends: 231 [2021-08-06 20:16:21,630 INFO L226 Difference]: Without dead ends: 223 [2021-08-06 20:16:21,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:16:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-06 20:16:21,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 195. [2021-08-06 20:16:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.3711340206185567) internal successors, (266), 194 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 266 transitions. [2021-08-06 20:16:21,634 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 266 transitions. Word has length 35 [2021-08-06 20:16:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:21,634 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 266 transitions. [2021-08-06 20:16:21,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 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 20:16:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 266 transitions. [2021-08-06 20:16:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:21,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:21,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:21,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:21,852 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,SelfDestructingSolverStorable26 [2021-08-06 20:16:21,853 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1850064479, now seen corresponding path program 27 times [2021-08-06 20:16:21,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:21,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143390057] [2021-08-06 20:16:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:21,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:21,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:21,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:21,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:21,989 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:22,010 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:22,014 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:22,038 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:22,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:22,057 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:22,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:22,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:22,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:22,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:22,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:22,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:22,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143390057] [2021-08-06 20:16:22,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143390057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:22,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532310397] [2021-08-06 20:16:22,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:16:22,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:22,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:22,204 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 20:16:22,205 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 20:16:23,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:16:23,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:23,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 20:16:23,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:23,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:16:23,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 20:16:23,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:23,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532310397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:23,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:23,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-08-06 20:16:23,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767915163] [2021-08-06 20:16:23,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 20:16:23,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 20:16:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:16:23,705 INFO L87 Difference]: Start difference. First operand 195 states and 266 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 20:16:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:24,442 INFO L93 Difference]: Finished difference Result 236 states and 320 transitions. [2021-08-06 20:16:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:16:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 35 [2021-08-06 20:16:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:24,443 INFO L225 Difference]: With dead ends: 236 [2021-08-06 20:16:24,443 INFO L226 Difference]: Without dead ends: 228 [2021-08-06 20:16:24,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 915.8ms TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 20:16:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-08-06 20:16:24,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 147. [2021-08-06 20:16:24,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.3424657534246576) internal successors, (196), 146 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 196 transitions. [2021-08-06 20:16:24,450 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 196 transitions. Word has length 35 [2021-08-06 20:16:24,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:24,450 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 196 transitions. [2021-08-06 20:16:24,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 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 20:16:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 196 transitions. [2021-08-06 20:16:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 20:16:24,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:24,451 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:24,479 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 20:16:24,676 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,SelfDestructingSolverStorable27 [2021-08-06 20:16:24,676 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:24,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1468601151, now seen corresponding path program 28 times [2021-08-06 20:16:24,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:24,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639844540] [2021-08-06 20:16:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:24,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:24,794 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:24,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:24,811 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:24,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:24,837 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:24,840 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:24,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:24,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:24,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:24,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:24,985 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:24,986 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:25,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:25,017 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:25,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:25,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639844540] [2021-08-06 20:16:25,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639844540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:25,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538680098] [2021-08-06 20:16:25,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:16:25,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:25,037 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 20:16:25,038 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 20:16:25,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:16:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:16:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:26,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-06 20:16:26,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:16:26,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538680098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:26,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:26,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:26,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183210510] [2021-08-06 20:16:26,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:26,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:26,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:26,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:26,423 INFO L87 Difference]: Start difference. First operand 147 states and 196 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:27,007 INFO L93 Difference]: Finished difference Result 190 states and 250 transitions. [2021-08-06 20:16:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:16:27,007 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 35 [2021-08-06 20:16:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:27,008 INFO L225 Difference]: With dead ends: 190 [2021-08-06 20:16:27,008 INFO L226 Difference]: Without dead ends: 182 [2021-08-06 20:16:27,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 571.7ms TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:16:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-06 20:16:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 113. [2021-08-06 20:16:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2021-08-06 20:16:27,010 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 35 [2021-08-06 20:16:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:27,011 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2021-08-06 20:16:27,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 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 20:16:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2021-08-06 20:16:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:27,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:27,011 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:27,043 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 20:16:27,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:16:27,225 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1164170887, now seen corresponding path program 29 times [2021-08-06 20:16:27,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:27,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853664809] [2021-08-06 20:16:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:27,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:27,409 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:16:27,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:16:27,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:27,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:27,443 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:27,447 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:27,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:27,476 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:27,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:27,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:27,614 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:27,615 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:27,636 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:27,637 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:27,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:27,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853664809] [2021-08-06 20:16:27,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853664809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:27,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796714377] [2021-08-06 20:16:27,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:27,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:27,657 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 20:16:27,659 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 20:16:28,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:16:28,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 20:16:28,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:29,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:29,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:29,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796714377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:29,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:29,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 25 [2021-08-06 20:16:29,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260645530] [2021-08-06 20:16:29,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 20:16:29,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:29,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 20:16:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:16:29,208 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:29,695 INFO L93 Difference]: Finished difference Result 185 states and 243 transitions. [2021-08-06 20:16:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:16:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:29,696 INFO L225 Difference]: With dead ends: 185 [2021-08-06 20:16:29,696 INFO L226 Difference]: Without dead ends: 177 [2021-08-06 20:16:29,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 11 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 671.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1509, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:16:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-08-06 20:16:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 113. [2021-08-06 20:16:29,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:29,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2021-08-06 20:16:29,699 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 43 [2021-08-06 20:16:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:29,699 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2021-08-06 20:16:29,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2021-08-06 20:16:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:29,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:29,700 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:29,718 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 20:16:29,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:29,905 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:29,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:29,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1462770627, now seen corresponding path program 30 times [2021-08-06 20:16:29,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:29,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131387027] [2021-08-06 20:16:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:29,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:30,081 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:16:30,083 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:16:30,096 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:30,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:30,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:30,113 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:30,137 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:16:30,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:16:30,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:30,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:30,281 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:30,282 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:30,303 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:30,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:16:30,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:30,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131387027] [2021-08-06 20:16:30,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131387027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:30,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763298382] [2021-08-06 20:16:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:16:30,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:30,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:30,325 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 20:16:30,326 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 20:16:31,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 20:16:31,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 20:16:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:31,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:16:31,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763298382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:31,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:31,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:31,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972362434] [2021-08-06 20:16:31,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:31,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:31,900 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 20:16:32,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:32,366 INFO L93 Difference]: Finished difference Result 207 states and 277 transitions. [2021-08-06 20:16:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:16:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 43 [2021-08-06 20:16:32,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:32,367 INFO L225 Difference]: With dead ends: 207 [2021-08-06 20:16:32,367 INFO L226 Difference]: Without dead ends: 199 [2021-08-06 20:16:32,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 20:16:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-06 20:16:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 121. [2021-08-06 20:16:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 120 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2021-08-06 20:16:32,370 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 43 [2021-08-06 20:16:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:32,370 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2021-08-06 20:16:32,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 20:16:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2021-08-06 20:16:32,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:32,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:32,370 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:32,410 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 20:16:32,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:32,577 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1021770105, now seen corresponding path program 31 times [2021-08-06 20:16:32,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:32,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860379614] [2021-08-06 20:16:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:32,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:32,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:32,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:32,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:32,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 57.4 percent of original size [2021-08-06 20:16:32,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:32,786 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:32,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:32,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:32,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:32,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:32,956 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:32,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:32,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:32,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:16:33,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:33,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860379614] [2021-08-06 20:16:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860379614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:33,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142481015] [2021-08-06 20:16:33,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:16:33,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:33,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:33,013 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 20:16:33,020 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 20:16:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 20:16:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:34,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:34,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 20:16:34,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142481015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:34,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:34,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2021-08-06 20:16:34,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531980147] [2021-08-06 20:16:34,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:16:34,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:34,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:16:34,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:16:34,617 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 20:16:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:35,196 INFO L93 Difference]: Finished difference Result 196 states and 268 transitions. [2021-08-06 20:16:35,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:16:35,196 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 43 [2021-08-06 20:16:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:35,197 INFO L225 Difference]: With dead ends: 196 [2021-08-06 20:16:35,197 INFO L226 Difference]: Without dead ends: 188 [2021-08-06 20:16:35,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 649.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:16:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-06 20:16:35,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 130. [2021-08-06 20:16:35,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3643410852713178) internal successors, (176), 129 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:35,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2021-08-06 20:16:35,200 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 43 [2021-08-06 20:16:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:35,200 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2021-08-06 20:16:35,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 20:16:35,200 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2021-08-06 20:16:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:35,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:35,201 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:35,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 20:16:35,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:35,419 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash 169341217, now seen corresponding path program 32 times [2021-08-06 20:16:35,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:35,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099378976] [2021-08-06 20:16:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:35,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:35,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:16:35,623 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 68.6 percent of original size [2021-08-06 20:16:35,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 72.5 percent of original size [2021-08-06 20:16:35,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 72.5 percent of original size [2021-08-06 20:16:35,666 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:35,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:35,697 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:16:35,702 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 67.2 percent of original size [2021-08-06 20:16:35,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:35,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:35,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:35,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:35,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:35,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:35,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:35,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099378976] [2021-08-06 20:16:35,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099378976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:35,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600797002] [2021-08-06 20:16:35,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:16:35,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:35,933 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 20:16:35,956 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 20:16:36,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:16:36,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:36,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 20:16:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:37,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:37,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:37,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600797002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:37,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:37,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-08-06 20:16:37,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290687096] [2021-08-06 20:16:37,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:16:37,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:16:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:16:37,631 INFO L87 Difference]: Start difference. First operand 130 states and 176 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 20:16:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:38,115 INFO L93 Difference]: Finished difference Result 221 states and 298 transitions. [2021-08-06 20:16:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:16:38,116 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 43 [2021-08-06 20:16:38,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:38,116 INFO L225 Difference]: With dead ends: 221 [2021-08-06 20:16:38,116 INFO L226 Difference]: Without dead ends: 213 [2021-08-06 20:16:38,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:16:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-06 20:16:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 121. [2021-08-06 20:16:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 120 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 161 transitions. [2021-08-06 20:16:38,119 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 161 transitions. Word has length 43 [2021-08-06 20:16:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:38,119 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 161 transitions. [2021-08-06 20:16:38,120 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 20:16:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 161 transitions. [2021-08-06 20:16:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:38,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:38,120 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:38,139 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 20:16:38,320 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,SelfDestructingSolverStorable32 [2021-08-06 20:16:38,321 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1979767781, now seen corresponding path program 33 times [2021-08-06 20:16:38,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:38,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444717307] [2021-08-06 20:16:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:38,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:38,509 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:38,512 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:38,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:38,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:38,555 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:38,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 64.4 percent of original size [2021-08-06 20:16:38,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:38,589 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:38,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:38,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:38,769 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:38,770 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:38,792 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:38,792 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:38,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:38,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444717307] [2021-08-06 20:16:38,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444717307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:38,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976853726] [2021-08-06 20:16:38,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:16:38,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:38,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:38,815 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 20:16:38,816 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 20:16:39,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 20:16:39,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:39,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:16:39,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:40,484 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 20:16:40,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-08-06 20:16:40,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:40,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976853726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:40,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:40,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-08-06 20:16:40,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150120944] [2021-08-06 20:16:40,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 20:16:40,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:40,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 20:16:40,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:16:40,689 INFO L87 Difference]: Start difference. First operand 121 states and 161 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:41,543 INFO L93 Difference]: Finished difference Result 187 states and 254 transitions. [2021-08-06 20:16:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:16:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:41,544 INFO L225 Difference]: With dead ends: 187 [2021-08-06 20:16:41,544 INFO L226 Difference]: Without dead ends: 179 [2021-08-06 20:16:41,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1102.5ms TimeCoverageRelationStatistics Valid=362, Invalid=2290, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 20:16:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-08-06 20:16:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-08-06 20:16:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 112 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2021-08-06 20:16:41,546 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 43 [2021-08-06 20:16:41,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:41,546 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2021-08-06 20:16:41,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2021-08-06 20:16:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:41,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:41,547 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:41,570 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 20:16:41,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:41,761 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:41,762 INFO L82 PathProgramCache]: Analyzing trace with hash 936823367, now seen corresponding path program 34 times [2021-08-06 20:16:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:41,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957110060] [2021-08-06 20:16:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:41,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:41,924 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:41,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:41,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:41,943 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:41,965 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:41,967 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:41,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:41,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:42,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:42,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:42,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:42,118 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:42,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:42,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:42,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:42,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957110060] [2021-08-06 20:16:42,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957110060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:42,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913007443] [2021-08-06 20:16:42,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:16:42,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:42,163 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 20:16:42,163 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 20:16:43,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:16:43,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-06 20:16:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:43,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:43,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 20:16:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:43,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913007443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:43,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:43,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-08-06 20:16:43,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687630156] [2021-08-06 20:16:43,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:16:43,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:43,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:16:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:16:43,976 INFO L87 Difference]: Start difference. First operand 113 states and 148 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 20:16:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:44,535 INFO L93 Difference]: Finished difference Result 155 states and 206 transitions. [2021-08-06 20:16:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:16:44,535 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 43 [2021-08-06 20:16:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:44,536 INFO L225 Difference]: With dead ends: 155 [2021-08-06 20:16:44,536 INFO L226 Difference]: Without dead ends: 147 [2021-08-06 20:16:44,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 646.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:16:44,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-06 20:16:44,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 109. [2021-08-06 20:16:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3333333333333333) internal successors, (144), 108 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2021-08-06 20:16:44,538 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 43 [2021-08-06 20:16:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2021-08-06 20:16:44,538 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 20:16:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2021-08-06 20:16:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 20:16:44,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:16:44,539 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:16:44,566 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 20:16:44,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:44,753 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 20:16:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:16:44,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1338897849, now seen corresponding path program 35 times [2021-08-06 20:16:44,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:16:44,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792711967] [2021-08-06 20:16:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:16:44,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:16:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:16:44,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:44,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 75.0 percent of original size [2021-08-06 20:16:44,942 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:44,945 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 77.8 percent of original size [2021-08-06 20:16:44,969 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:44,972 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 20:16:44,990 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:44,993 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 70.3 percent of original size [2021-08-06 20:16:45,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:45,015 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 76.2 percent of original size [2021-08-06 20:16:45,143 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:45,144 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 65.0 percent of original size [2021-08-06 20:16:45,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:45,173 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 20:16:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 20:16:45,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:16:45,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792711967] [2021-08-06 20:16:45,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792711967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:45,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240703443] [2021-08-06 20:16:45,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:16:45,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:16:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:16:45,201 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 20:16:45,220 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 20:16:46,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 20:16:46,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:16:46,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-06 20:16:46,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:16:46,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 91.7 percent of original size [2021-08-06 20:16:46,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 91.7 percent of original size [2021-08-06 20:16:48,059 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-08-06 20:16:48,060 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 99 treesize of output 71 [2021-08-06 20:16:48,394 INFO L354 Elim1Store]: treesize reduction 296, result has 4.2 percent of original size [2021-08-06 20:16:48,394 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 60 treesize of output 44 [2021-08-06 20:16:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:16:48,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240703443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:16:48,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:16:48,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 42 [2021-08-06 20:16:48,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725865842] [2021-08-06 20:16:48,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 20:16:48,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:16:48,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 20:16:48,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1696, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:16:48,508 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:53,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:16:53,453 INFO L93 Difference]: Finished difference Result 367 states and 504 transitions. [2021-08-06 20:16:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-06 20:16:53,453 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 20:16:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:16:53,453 INFO L225 Difference]: With dead ends: 367 [2021-08-06 20:16:53,453 INFO L226 Difference]: Without dead ends: 0 [2021-08-06 20:16:53,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3715 ImplicationChecksByTransitivity, 4849.3ms TimeCoverageRelationStatistics Valid=883, Invalid=12457, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 20:16:53,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-06 20:16:53,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-06 20:16:53,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:53,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-06 20:16:53,455 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-08-06 20:16:53,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:16:53,455 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-06 20:16:53,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:16:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-06 20:16:53,455 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-06 20:16:53,457 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:16:53,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:16:53,458 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:16:53,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 20:16:53,668 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,SelfDestructingSolverStorable35 [2021-08-06 20:16:53,672 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:16:53,672 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:16:53,674 INFO L202 PluginConnector]: Adding new model two-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:16:53 BasicIcfg [2021-08-06 20:16:53,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:16:53,674 INFO L168 Benchmark]: Toolchain (without parser) took 82544.11 ms. Allocated memory was 189.8 MB in the beginning and 685.8 MB in the end (delta: 496.0 MB). Free memory was 170.7 MB in the beginning and 259.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 408.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:16:53,674 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 189.8 MB. Free memory was 171.9 MB in the beginning and 171.8 MB in the end (delta: 131.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:16:53,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.96 ms. Allocated memory is still 189.8 MB. Free memory was 170.7 MB in the beginning and 169.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 20:16:53,675 INFO L168 Benchmark]: Boogie Preprocessor took 13.49 ms. Allocated memory is still 189.8 MB. Free memory was 169.2 MB in the beginning and 168.2 MB in the end (delta: 971.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:16:53,675 INFO L168 Benchmark]: RCFGBuilder took 342.32 ms. Allocated memory is still 189.8 MB. Free memory was 168.2 MB in the beginning and 154.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-06 20:16:53,675 INFO L168 Benchmark]: TraceAbstraction took 82153.85 ms. Allocated memory was 189.8 MB in the beginning and 685.8 MB in the end (delta: 496.0 MB). Free memory was 153.9 MB in the beginning and 259.9 MB in the end (delta: -106.0 MB). Peak memory consumption was 390.8 MB. Max. memory is 8.0 GB. [2021-08-06 20:16:53,675 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 0.16 ms. Allocated memory is still 189.8 MB. Free memory was 171.9 MB in the beginning and 171.8 MB in the end (delta: 131.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.96 ms. Allocated memory is still 189.8 MB. Free memory was 170.7 MB in the beginning and 169.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.49 ms. Allocated memory is still 189.8 MB. Free memory was 169.2 MB in the beginning and 168.2 MB in the end (delta: 971.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.32 ms. Allocated memory is still 189.8 MB. Free memory was 168.2 MB in the beginning and 154.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 82153.85 ms. Allocated memory was 189.8 MB in the beginning and 685.8 MB in the end (delta: 496.0 MB). Free memory was 153.9 MB in the beginning and 259.9 MB in the end (delta: -106.0 MB). Peak memory consumption was 390.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 57, positive: 47, positive conditional: 47, positive unconditional: 0, negative: 10, negative conditional: 10, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 48, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 48, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 48, positive: 46, positive conditional: 0, positive unconditional: 46, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 23, positive: 7, positive conditional: 0, positive unconditional: 7, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 48, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 48, unknown conditional: 0, unknown unconditional: 48] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Independence queries for same thread: 9 - 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 - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 82026.2ms, OverallIterations: 36, TraceHistogramMax: 4, EmptinessCheckTime: 43.4ms, AutomataDifference: 24451.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 101.4ms, PartialOrderReductionTime: 83.0ms, HoareTripleCheckerStatistics: 591 SDtfs, 2122 SDslu, 5242 SDs, 0 SdLazy, 17348 SolverSat, 1650 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7819.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2241 GetRequests, 791 SyntacticMatches, 194 SemanticMatches, 1256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14641 ImplicationChecksByTransitivity, 26037.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=213occurred in iteration=11, InterpolantAutomatonStates: 911, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 177.2ms AutomataMinimizationTime, 36 MinimizatonAttempts, 1773 StatesRemovedByMinimization, 35 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 159.3ms SsaConstructionTime, 884.5ms SatisfiabilityAnalysisTime, 32097.9ms InterpolantComputationTime, 2279 NumberOfCodeBlocks, 2279 NumberOfCodeBlocksAsserted, 132 NumberOfCheckSat, 2210 ConstructedInterpolants, 22 QuantifiedInterpolants, 27122 SizeOfPredicates, 228 NumberOfNonLiveVariables, 3168 ConjunctsInSsa, 958 ConjunctsInUnsatCore, 69 InterpolantComputations, 4 PerfectInterpolantSequences, 305/1944 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-06 20:16:53,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...