/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/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:27:41,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:27:41,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:27:41,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:27:41,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 19:27:41,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 19:27:41,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 19:27:41,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 19:27:41,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 19:27:41,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 19:27:41,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 19:27:41,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 19:27:41,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 19:27:41,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 19:27:41,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 19:27:41,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 19:27:41,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 19:27:41,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 19:27:41,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:27:41,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:27:41,318 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:27:41,318 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:27:41,319 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:27:41,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:27:41,319 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:27:41,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:27:41,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:27:41,320 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:27:41,320 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:27:41,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:27:41,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:27:41,342 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:27:41,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:27:41,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:27:41,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:27:41,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:27:41,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:27:41,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:27:41,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:27:41,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:27:41,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:27:41,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:27:41,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:27:41,343 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:27:41,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:27:41,344 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:27:41,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:27:41,344 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:27:41,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:27:41,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:27:41,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:27:41,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:27:41,671 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:27:41,672 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:27:41,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-08-06 19:27:41,673 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-08-06 19:27:41,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:27:41,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:27:41,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:27:41,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:27:41,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:27:41,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,714 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:27:41,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:27:41,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:27:41,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:27:41,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:27:41,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:27:41,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:27:41,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:27:41,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/1) ... [2021-08-06 19:27:41,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:27:41,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:41,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:27:41,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:27:41,819 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:27:41,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:27:41,819 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:27:41,819 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:27:41,819 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:27:41,820 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:27:41,820 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:27:41,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:27:41,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:27:41,821 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:27:42,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:27:42,020 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:27:42,021 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:27:42 BoogieIcfgContainer [2021-08-06 19:27:42,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:27:42,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:27:42,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:27:42,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:27:42,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:27:41" (1/2) ... [2021-08-06 19:27:42,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f01b4b8 and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:27:42, skipping insertion in model container [2021-08-06 19:27:42,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:27:42" (2/2) ... [2021-08-06 19:27:42,030 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-08-06 19:27:42,034 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:27:42,034 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:27:42,034 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:27:42,034 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:27:42,087 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 19:27:42,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:27:42,142 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:27:42,142 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 19:27:42,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 59 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 58 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 19:27:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:27:42,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:42,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:42,239 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:42,257 INFO L82 PathProgramCache]: Analyzing trace with hash 718564348, now seen corresponding path program 1 times [2021-08-06 19:27:42,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:42,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138008114] [2021-08-06 19:27:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:42,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:42,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:42,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138008114] [2021-08-06 19:27:42,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138008114] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:27:42,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:27:42,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:27:42,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71549071] [2021-08-06 19:27:42,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:27:42,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:27:42,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:27:42,451 INFO L87 Difference]: Start difference. First operand has 59 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 58 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) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:42,491 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-08-06 19:27:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:27:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:27:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:42,500 INFO L225 Difference]: With dead ends: 99 [2021-08-06 19:27:42,501 INFO L226 Difference]: Without dead ends: 58 [2021-08-06 19:27:42,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:27:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-06 19:27:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2021-08-06 19:27:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.4375) internal successors, (69), 48 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:42,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 69 transitions. [2021-08-06 19:27:42,540 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 69 transitions. Word has length 12 [2021-08-06 19:27:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:42,540 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 69 transitions. [2021-08-06 19:27:42,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:42,541 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 69 transitions. [2021-08-06 19:27:42,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:27:42,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:42,541 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:42,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:27:42,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1904974861, now seen corresponding path program 1 times [2021-08-06 19:27:42,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:42,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384393064] [2021-08-06 19:27:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:42,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:42,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:42,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384393064] [2021-08-06 19:27:42,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384393064] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:27:42,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:27:42,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:27:42,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305960650] [2021-08-06 19:27:42,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:42,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:42,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:42,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:42,695 INFO L87 Difference]: Start difference. First operand 49 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 19:27:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:42,759 INFO L93 Difference]: Finished difference Result 98 states and 135 transitions. [2021-08-06 19:27:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:42,760 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 19:27:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:42,765 INFO L225 Difference]: With dead ends: 98 [2021-08-06 19:27:42,766 INFO L226 Difference]: Without dead ends: 98 [2021-08-06 19:27:42,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-06 19:27:42,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 54. [2021-08-06 19:27:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.471698113207547) internal successors, (78), 53 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2021-08-06 19:27:42,773 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 15 [2021-08-06 19:27:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:42,773 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2021-08-06 19:27:42,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 19:27:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2021-08-06 19:27:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:27:42,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:42,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 19:27:42,775 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1262409697, now seen corresponding path program 2 times [2021-08-06 19:27:42,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:42,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724366948] [2021-08-06 19:27:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:42,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:42,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:42,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724366948] [2021-08-06 19:27:42,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724366948] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:27:42,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:27:42,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:27:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403295248] [2021-08-06 19:27:42,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:27:42,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:27:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:27:42,806 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 19:27:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:42,829 INFO L93 Difference]: Finished difference Result 82 states and 116 transitions. [2021-08-06 19:27:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:27:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 19:27:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:42,831 INFO L225 Difference]: With dead ends: 82 [2021-08-06 19:27:42,831 INFO L226 Difference]: Without dead ends: 80 [2021-08-06 19:27:42,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:27:42,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-06 19:27:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-08-06 19:27:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 53 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 19:27:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 77 transitions. [2021-08-06 19:27:42,844 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 77 transitions. Word has length 15 [2021-08-06 19:27:42,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:42,845 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 77 transitions. [2021-08-06 19:27:42,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 19:27:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 77 transitions. [2021-08-06 19:27:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:27:42,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:42,845 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 19:27:42,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:27:42,846 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2339164, now seen corresponding path program 1 times [2021-08-06 19:27:42,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:42,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573262207] [2021-08-06 19:27:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:42,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:42,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:42,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573262207] [2021-08-06 19:27:42,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573262207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:42,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244772080] [2021-08-06 19:27:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:42,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:42,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:42,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:42,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:27:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:42,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-06 19:27:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:43,158 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:27:43,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:27:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:43,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244772080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:43,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:43,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-06 19:27:43,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353772338] [2021-08-06 19:27:43,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:43,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:43,182 INFO L87 Difference]: Start difference. First operand 54 states and 77 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:43,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:43,223 INFO L93 Difference]: Finished difference Result 104 states and 147 transitions. [2021-08-06 19:27:43,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:27:43,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 19:27:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:43,226 INFO L225 Difference]: With dead ends: 104 [2021-08-06 19:27:43,226 INFO L226 Difference]: Without dead ends: 104 [2021-08-06 19:27:43,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-06 19:27:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 52. [2021-08-06 19:27:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 51 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2021-08-06 19:27:43,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 19 [2021-08-06 19:27:43,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:43,243 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2021-08-06 19:27:43,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2021-08-06 19:27:43,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:27:43,247 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:43,247 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 19:27:43,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:43,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:43,455 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:43,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:43,455 INFO L82 PathProgramCache]: Analyzing trace with hash -383597929, now seen corresponding path program 1 times [2021-08-06 19:27:43,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:43,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60787083] [2021-08-06 19:27:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:43,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:43,643 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 61.1 percent of original size [2021-08-06 19:27:43,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 61.1 percent of original size [2021-08-06 19:27:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:43,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:43,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60787083] [2021-08-06 19:27:43,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60787083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:43,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202617101] [2021-08-06 19:27:43,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:43,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:43,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:43,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:43,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:27:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:43,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:43,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:43,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202617101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:43,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:43,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-06 19:27:43,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511923854] [2021-08-06 19:27:43,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:27:43,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:43,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:27:43,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:27:43,981 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:44,103 INFO L93 Difference]: Finished difference Result 104 states and 152 transitions. [2021-08-06 19:27:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:27:44,103 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:27:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:44,104 INFO L225 Difference]: With dead ends: 104 [2021-08-06 19:27:44,104 INFO L226 Difference]: Without dead ends: 92 [2021-08-06 19:27:44,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:44,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-06 19:27:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-08-06 19:27:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 73 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 112 transitions. [2021-08-06 19:27:44,109 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 112 transitions. Word has length 19 [2021-08-06 19:27:44,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:44,109 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 112 transitions. [2021-08-06 19:27:44,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:44,109 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 112 transitions. [2021-08-06 19:27:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:27:44,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:44,110 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 19:27:44,130 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 19:27:44,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:44,325 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1924605847, now seen corresponding path program 2 times [2021-08-06 19:27:44,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:44,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587503239] [2021-08-06 19:27:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:44,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:44,434 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 19:27:44,442 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 19:27:44,495 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 19:27:44,510 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 70.5 percent of original size [2021-08-06 19:27:44,557 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 61.1 percent of original size [2021-08-06 19:27:44,566 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 61.1 percent of original size [2021-08-06 19:27:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:44,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587503239] [2021-08-06 19:27:44,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587503239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:44,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180994185] [2021-08-06 19:27:44,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:44,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:44,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:44,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:44,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:27:44,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:44,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:27:44,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:44,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180994185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:44,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:44,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:27:44,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900079374] [2021-08-06 19:27:44,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:27:44,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:44,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:27:44,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:27:44,924 INFO L87 Difference]: Start difference. First operand 74 states and 112 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:45,142 INFO L93 Difference]: Finished difference Result 129 states and 186 transitions. [2021-08-06 19:27:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:27:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:45,143 INFO L225 Difference]: With dead ends: 129 [2021-08-06 19:27:45,143 INFO L226 Difference]: Without dead ends: 119 [2021-08-06 19:27:45,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:27:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-06 19:27:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-08-06 19:27:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.524390243902439) internal successors, (125), 82 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 19:27:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2021-08-06 19:27:45,169 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 19 [2021-08-06 19:27:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:45,169 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2021-08-06 19:27:45,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2021-08-06 19:27:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:27:45,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:45,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:45,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:45,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:45,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash 789946443, now seen corresponding path program 1 times [2021-08-06 19:27:45,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:45,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229190328] [2021-08-06 19:27:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:45,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:45,553 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:45,554 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:45,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:45,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229190328] [2021-08-06 19:27:45,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229190328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:45,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258474579] [2021-08-06 19:27:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:45,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:45,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:45,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:45,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:27:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:45,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:27:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:46,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258474579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:46,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:46,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-06 19:27:46,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755720174] [2021-08-06 19:27:46,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:27:46,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:46,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:27:46,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:46,099 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:46,339 INFO L93 Difference]: Finished difference Result 194 states and 284 transitions. [2021-08-06 19:27:46,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:27:46,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:27:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:46,341 INFO L225 Difference]: With dead ends: 194 [2021-08-06 19:27:46,341 INFO L226 Difference]: Without dead ends: 186 [2021-08-06 19:27:46,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 275.1ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:27:46,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-06 19:27:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 129. [2021-08-06 19:27:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.5859375) internal successors, (203), 128 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 203 transitions. [2021-08-06 19:27:46,347 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 203 transitions. Word has length 22 [2021-08-06 19:27:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:46,347 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 203 transitions. [2021-08-06 19:27:46,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 203 transitions. [2021-08-06 19:27:46,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:27:46,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:46,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:46,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:46,572 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 19:27:46,573 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:46,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash 180722624, now seen corresponding path program 3 times [2021-08-06 19:27:46,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:46,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583120345] [2021-08-06 19:27:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:46,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:46,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:46,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583120345] [2021-08-06 19:27:46,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583120345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:46,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493759544] [2021-08-06 19:27:46,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:46,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:46,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:46,643 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:46,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:27:46,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:27:46,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:27:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:46,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:27:46,838 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:27:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:46,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493759544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:46,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:46,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-06 19:27:46,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546063197] [2021-08-06 19:27:46,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:27:46,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:27:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:46,871 INFO L87 Difference]: Start difference. First operand 129 states and 203 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:46,981 INFO L93 Difference]: Finished difference Result 278 states and 421 transitions. [2021-08-06 19:27:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:27:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:27:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:46,983 INFO L225 Difference]: With dead ends: 278 [2021-08-06 19:27:46,983 INFO L226 Difference]: Without dead ends: 278 [2021-08-06 19:27:46,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:27:46,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-08-06 19:27:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 214. [2021-08-06 19:27:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.6291079812206573) internal successors, (347), 213 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 347 transitions. [2021-08-06 19:27:47,001 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 347 transitions. Word has length 22 [2021-08-06 19:27:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:47,001 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 347 transitions. [2021-08-06 19:27:47,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:47,001 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 347 transitions. [2021-08-06 19:27:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:27:47,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:47,002 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:47,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:47,216 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 19:27:47,217 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash 976068375, now seen corresponding path program 2 times [2021-08-06 19:27:47,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:47,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077371991] [2021-08-06 19:27:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:47,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:47,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:27:47,321 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:27:47,346 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:27:47,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:27:47,376 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:47,378 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:47,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:47,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077371991] [2021-08-06 19:27:47,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077371991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:47,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905620377] [2021-08-06 19:27:47,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:47,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:47,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:47,395 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:47,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:27:47,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:47,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:27:47,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:47,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905620377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:47,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:47,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 19:27:47,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474695815] [2021-08-06 19:27:47,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:27:47,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:27:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:27:47,864 INFO L87 Difference]: Start difference. First operand 214 states and 347 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:48,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:48,201 INFO L93 Difference]: Finished difference Result 398 states and 612 transitions. [2021-08-06 19:27:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:27:48,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:27:48,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:48,205 INFO L225 Difference]: With dead ends: 398 [2021-08-06 19:27:48,205 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 19:27:48,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:27:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 19:27:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-08-06 19:27:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.6632302405498283) internal successors, (484), 291 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 484 transitions. [2021-08-06 19:27:48,214 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 484 transitions. Word has length 22 [2021-08-06 19:27:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:48,214 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 484 transitions. [2021-08-06 19:27:48,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 484 transitions. [2021-08-06 19:27:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:27:48,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:48,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:48,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:48,428 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 19:27:48,429 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:48,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1429659259, now seen corresponding path program 3 times [2021-08-06 19:27:48,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:48,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100752118] [2021-08-06 19:27:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:48,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:48,571 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:48,574 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:48,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:48,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:48,618 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:48,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:48,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100752118] [2021-08-06 19:27:48,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100752118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115799904] [2021-08-06 19:27:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:48,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:48,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:48,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:48,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:27:48,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:27:48,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:48,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:27:48,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:49,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115799904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:49,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:49,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-06 19:27:49,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152509360] [2021-08-06 19:27:49,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:27:49,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:49,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:27:49,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:49,157 INFO L87 Difference]: Start difference. First operand 292 states and 484 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:49,555 INFO L93 Difference]: Finished difference Result 484 states and 771 transitions. [2021-08-06 19:27:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:27:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 22 [2021-08-06 19:27:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:49,559 INFO L225 Difference]: With dead ends: 484 [2021-08-06 19:27:49,560 INFO L226 Difference]: Without dead ends: 480 [2021-08-06 19:27:49,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:27:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-08-06 19:27:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 360. [2021-08-06 19:27:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.7186629526462396) internal successors, (617), 359 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 617 transitions. [2021-08-06 19:27:49,571 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 617 transitions. Word has length 22 [2021-08-06 19:27:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:49,572 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 617 transitions. [2021-08-06 19:27:49,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 617 transitions. [2021-08-06 19:27:49,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:27:49,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:49,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:49,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:49,784 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 19:27:49,785 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1869036257, now seen corresponding path program 4 times [2021-08-06 19:27:49,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:49,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046474042] [2021-08-06 19:27:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:49,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:49,905 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:27:49,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:27:49,933 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:49,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:49,963 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:49,965 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:49,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:49,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:50,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:50,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046474042] [2021-08-06 19:27:50,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046474042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:50,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711732842] [2021-08-06 19:27:50,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:50,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:50,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:50,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:27:50,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:50,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:50,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:27:50,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:50,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711732842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:50,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:50,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-06 19:27:50,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226058473] [2021-08-06 19:27:50,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:27:50,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:50,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:27:50,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:50,583 INFO L87 Difference]: Start difference. First operand 360 states and 617 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:50,879 INFO L93 Difference]: Finished difference Result 426 states and 713 transitions. [2021-08-06 19:27:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:27:50,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 22 [2021-08-06 19:27:50,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:50,882 INFO L225 Difference]: With dead ends: 426 [2021-08-06 19:27:50,882 INFO L226 Difference]: Without dead ends: 422 [2021-08-06 19:27:50,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 292.3ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:27:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-06 19:27:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 380. [2021-08-06 19:27:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 1.733509234828496) internal successors, (657), 379 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 657 transitions. [2021-08-06 19:27:50,894 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 657 transitions. Word has length 22 [2021-08-06 19:27:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:50,894 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 657 transitions. [2021-08-06 19:27:50,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 657 transitions. [2021-08-06 19:27:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:27:50,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:50,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:50,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:51,116 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 19:27:51,117 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash 152116873, now seen corresponding path program 5 times [2021-08-06 19:27:51,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:51,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583163327] [2021-08-06 19:27:51,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:51,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:51,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:27:51,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.6 percent of original size [2021-08-06 19:27:51,259 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:51,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:51,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:51,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:51,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:51,307 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:51,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:51,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583163327] [2021-08-06 19:27:51,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583163327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:51,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883492092] [2021-08-06 19:27:51,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:51,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:51,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:51,320 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:51,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:27:51,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:27:51,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:27:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:51,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883492092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:51,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:51,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-06 19:27:51,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38246044] [2021-08-06 19:27:51,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:27:51,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:27:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:27:51,859 INFO L87 Difference]: Start difference. First operand 380 states and 657 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:52,167 INFO L93 Difference]: Finished difference Result 449 states and 758 transitions. [2021-08-06 19:27:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:27:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 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 22 [2021-08-06 19:27:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:52,170 INFO L225 Difference]: With dead ends: 449 [2021-08-06 19:27:52,170 INFO L226 Difference]: Without dead ends: 445 [2021-08-06 19:27:52,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:27:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-08-06 19:27:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 406. [2021-08-06 19:27:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.7407407407407407) internal successors, (705), 405 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 705 transitions. [2021-08-06 19:27:52,181 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 705 transitions. Word has length 22 [2021-08-06 19:27:52,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:52,182 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 705 transitions. [2021-08-06 19:27:52,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:52,182 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 705 transitions. [2021-08-06 19:27:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:52,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:52,183 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:52,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:52,396 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 19:27:52,397 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 816543255, now seen corresponding path program 6 times [2021-08-06 19:27:52,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:52,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592348019] [2021-08-06 19:27:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:52,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:52,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:52,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:52,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:52,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592348019] [2021-08-06 19:27:52,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592348019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:52,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361350835] [2021-08-06 19:27:52,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:52,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:52,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:52,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:52,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:27:52,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:27:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:27:52,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:53,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361350835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:53,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:53,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:27:53,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231780614] [2021-08-06 19:27:53,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:27:53,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:27:53,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:27:53,241 INFO L87 Difference]: Start difference. First operand 406 states and 705 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:53,867 INFO L93 Difference]: Finished difference Result 691 states and 1139 transitions. [2021-08-06 19:27:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:27:53,867 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:27:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:53,870 INFO L225 Difference]: With dead ends: 691 [2021-08-06 19:27:53,870 INFO L226 Difference]: Without dead ends: 683 [2021-08-06 19:27:53,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 519.5ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:27:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-06 19:27:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 502. [2021-08-06 19:27:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 1.780439121756487) internal successors, (892), 501 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 892 transitions. [2021-08-06 19:27:53,885 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 892 transitions. Word has length 25 [2021-08-06 19:27:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:53,885 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 892 transitions. [2021-08-06 19:27:53,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 892 transitions. [2021-08-06 19:27:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:53,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:53,886 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:53,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:54,105 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 19:27:54,105 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:54,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:54,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1369794236, now seen corresponding path program 7 times [2021-08-06 19:27:54,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:54,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657831833] [2021-08-06 19:27:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:54,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:54,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657831833] [2021-08-06 19:27:54,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657831833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:54,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102118727] [2021-08-06 19:27:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:27:54,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:54,152 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:54,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:27:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:27:54,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:54,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:27:54,475 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:27:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:54,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102118727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:54,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:54,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 19:27:54,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081032390] [2021-08-06 19:27:54,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:54,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:54,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:54,502 INFO L87 Difference]: Start difference. First operand 502 states and 892 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:54,564 INFO L93 Difference]: Finished difference Result 852 states and 1476 transitions. [2021-08-06 19:27:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:54,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:27:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:54,568 INFO L225 Difference]: With dead ends: 852 [2021-08-06 19:27:54,568 INFO L226 Difference]: Without dead ends: 852 [2021-08-06 19:27:54,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:27:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-06 19:27:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 746. [2021-08-06 19:27:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 1.8214765100671142) internal successors, (1357), 745 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1357 transitions. [2021-08-06 19:27:54,608 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1357 transitions. Word has length 25 [2021-08-06 19:27:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:54,608 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1357 transitions. [2021-08-06 19:27:54,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:54,608 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1357 transitions. [2021-08-06 19:27:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:54,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:54,610 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:54,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:54,810 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 19:27:54,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash -727229072, now seen corresponding path program 8 times [2021-08-06 19:27:54,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:54,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892885068] [2021-08-06 19:27:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:54,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:54,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:54,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892885068] [2021-08-06 19:27:54,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892885068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:54,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967968063] [2021-08-06 19:27:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:27:54,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:54,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:54,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:54,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:27:55,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:27:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:27:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:55,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:27:55,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:27:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:27:55,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967968063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:55,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:55,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-06 19:27:55,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666284897] [2021-08-06 19:27:55,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:27:55,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:55,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:27:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:27:55,207 INFO L87 Difference]: Start difference. First operand 746 states and 1357 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:55,249 INFO L93 Difference]: Finished difference Result 847 states and 1468 transitions. [2021-08-06 19:27:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:27:55,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:27:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:55,252 INFO L225 Difference]: With dead ends: 847 [2021-08-06 19:27:55,252 INFO L226 Difference]: Without dead ends: 845 [2021-08-06 19:27:55,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:55,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-08-06 19:27:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 748. [2021-08-06 19:27:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 1.8152610441767068) internal successors, (1356), 747 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1356 transitions. [2021-08-06 19:27:55,270 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1356 transitions. Word has length 25 [2021-08-06 19:27:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:55,271 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1356 transitions. [2021-08-06 19:27:55,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1356 transitions. [2021-08-06 19:27:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:55,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:55,272 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:55,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:55,488 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 19:27:55,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash -737666620, now seen corresponding path program 9 times [2021-08-06 19:27:55,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:55,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593902826] [2021-08-06 19:27:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:55,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:55,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:55,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593902826] [2021-08-06 19:27:55,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593902826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:55,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029985642] [2021-08-06 19:27:55,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:27:55,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:55,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:55,526 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:55,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:27:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:27:55,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:27:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:55,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:27:55,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:27:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029985642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:55,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:55,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 19:27:55,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848214337] [2021-08-06 19:27:55,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:55,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:55,920 INFO L87 Difference]: Start difference. First operand 748 states and 1356 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:55,972 INFO L93 Difference]: Finished difference Result 841 states and 1456 transitions. [2021-08-06 19:27:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:27:55,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:27:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:55,975 INFO L225 Difference]: With dead ends: 841 [2021-08-06 19:27:55,975 INFO L226 Difference]: Without dead ends: 833 [2021-08-06 19:27:55,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:27:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-08-06 19:27:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 756. [2021-08-06 19:27:55,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 1.8079470198675496) internal successors, (1365), 755 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:55,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1365 transitions. [2021-08-06 19:27:55,993 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1365 transitions. Word has length 25 [2021-08-06 19:27:55,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:55,993 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1365 transitions. [2021-08-06 19:27:55,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:55,994 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1365 transitions. [2021-08-06 19:27:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:55,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:55,995 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:56,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:56,208 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 19:27:56,209 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -313919593, now seen corresponding path program 10 times [2021-08-06 19:27:56,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:56,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064261856] [2021-08-06 19:27:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:56,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:56,345 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:27:56,347 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:27:56,368 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:27:56,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:27:56,391 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:56,392 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:56,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:56,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064261856] [2021-08-06 19:27:56,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064261856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:56,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522347586] [2021-08-06 19:27:56,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:27:56,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:56,412 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:56,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:27:56,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:27:56,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:27:56,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:57,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522347586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:57,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:57,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 19:27:57,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856982048] [2021-08-06 19:27:57,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:27:57,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:27:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:27:57,135 INFO L87 Difference]: Start difference. First operand 756 states and 1365 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:57,723 INFO L93 Difference]: Finished difference Result 1236 states and 2123 transitions. [2021-08-06 19:27:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:27:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:27:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:57,728 INFO L225 Difference]: With dead ends: 1236 [2021-08-06 19:27:57,729 INFO L226 Difference]: Without dead ends: 1224 [2021-08-06 19:27:57,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:27:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-08-06 19:27:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 868. [2021-08-06 19:27:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.8350634371395618) internal successors, (1591), 867 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1591 transitions. [2021-08-06 19:27:57,759 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1591 transitions. Word has length 25 [2021-08-06 19:27:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:57,759 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1591 transitions. [2021-08-06 19:27:57,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:57,759 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1591 transitions. [2021-08-06 19:27:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:57,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:57,761 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:57,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:57,984 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 19:27:57,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -771531996, now seen corresponding path program 11 times [2021-08-06 19:27:57,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:57,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314716927] [2021-08-06 19:27:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:57,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:58,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:58,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314716927] [2021-08-06 19:27:58,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314716927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:58,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402321587] [2021-08-06 19:27:58,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:27:58,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:58,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:58,041 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:58,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:27:58,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:27:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:27:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:58,428 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:27:58,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:27:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:58,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402321587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:58,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:58,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-08-06 19:27:58,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114882414] [2021-08-06 19:27:58,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:27:58,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:27:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:27:58,463 INFO L87 Difference]: Start difference. First operand 868 states and 1591 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 19:27:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:27:58,513 INFO L93 Difference]: Finished difference Result 896 states and 1617 transitions. [2021-08-06 19:27:58,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:27:58,514 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 25 [2021-08-06 19:27:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:27:58,517 INFO L225 Difference]: With dead ends: 896 [2021-08-06 19:27:58,517 INFO L226 Difference]: Without dead ends: 894 [2021-08-06 19:27:58,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:27:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-08-06 19:27:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 868. [2021-08-06 19:27:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.8246828143021914) internal successors, (1582), 867 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:27:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1582 transitions. [2021-08-06 19:27:58,538 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1582 transitions. Word has length 25 [2021-08-06 19:27:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:27:58,538 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1582 transitions. [2021-08-06 19:27:58,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 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 19:27:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1582 transitions. [2021-08-06 19:27:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:27:58,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:27:58,540 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:27:58,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:27:58,764 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 19:27:58,764 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:27:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:27:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash 169903891, now seen corresponding path program 12 times [2021-08-06 19:27:58,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:27:58,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161180630] [2021-08-06 19:27:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:27:58,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:27:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:27:58,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:27:58,883 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:27:58,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:58,909 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:27:58,934 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:58,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:27:58,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:58,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:27:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:27:58,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:27:58,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161180630] [2021-08-06 19:27:58,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161180630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:58,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832882437] [2021-08-06 19:27:58,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:27:58,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:27:58,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:27:58,978 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:27:58,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:27:59,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:27:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:27:59,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:27:59,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:27:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:27:59,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832882437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:27:59,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:27:59,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:27:59,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517087495] [2021-08-06 19:27:59,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:27:59,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:27:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:27:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:27:59,724 INFO L87 Difference]: Start difference. First operand 868 states and 1582 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:00,488 INFO L93 Difference]: Finished difference Result 1343 states and 2352 transitions. [2021-08-06 19:28:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:28:00,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:28:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:00,493 INFO L225 Difference]: With dead ends: 1343 [2021-08-06 19:28:00,494 INFO L226 Difference]: Without dead ends: 1327 [2021-08-06 19:28:00,494 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:28:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-08-06 19:28:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1055. [2021-08-06 19:28:00,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 1.8690702087286528) internal successors, (1970), 1054 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1970 transitions. [2021-08-06 19:28:00,522 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1970 transitions. Word has length 25 [2021-08-06 19:28:00,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:00,522 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 1970 transitions. [2021-08-06 19:28:00,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1970 transitions. [2021-08-06 19:28:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:28:00,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:00,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:00,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:00,744 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 19:28:00,745 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash 773404265, now seen corresponding path program 13 times [2021-08-06 19:28:00,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:00,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379609217] [2021-08-06 19:28:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:00,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:00,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:00,870 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:00,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:00,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:00,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:00,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:00,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:00,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:00,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:00,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379609217] [2021-08-06 19:28:00,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379609217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:00,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995616852] [2021-08-06 19:28:00,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:00,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:00,969 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:00,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:28:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:01,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:01,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995616852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:01,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:01,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:28:01,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455836846] [2021-08-06 19:28:01,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:28:01,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:28:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:01,654 INFO L87 Difference]: Start difference. First operand 1055 states and 1970 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:02,317 INFO L93 Difference]: Finished difference Result 1355 states and 2412 transitions. [2021-08-06 19:28:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:28:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:28:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:02,322 INFO L225 Difference]: With dead ends: 1355 [2021-08-06 19:28:02,322 INFO L226 Difference]: Without dead ends: 1339 [2021-08-06 19:28:02,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:28:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-08-06 19:28:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1118. [2021-08-06 19:28:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 1.88272157564906) internal successors, (2103), 1117 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 2103 transitions. [2021-08-06 19:28:02,348 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 2103 transitions. Word has length 25 [2021-08-06 19:28:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:02,348 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 2103 transitions. [2021-08-06 19:28:02,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 2103 transitions. [2021-08-06 19:28:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:28:02,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:02,350 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:02,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:02,564 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 19:28:02,565 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:02,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1394652883, now seen corresponding path program 14 times [2021-08-06 19:28:02,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:02,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355479604] [2021-08-06 19:28:02,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:02,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:02,701 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:02,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:02,725 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:02,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:02,747 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:02,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:02,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:02,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355479604] [2021-08-06 19:28:02,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355479604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:02,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179048058] [2021-08-06 19:28:02,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:02,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:02,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:02,764 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:02,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:28:03,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:03,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:03,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179048058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:03,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:03,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:28:03,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285302381] [2021-08-06 19:28:03,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:28:03,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:28:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:03,448 INFO L87 Difference]: Start difference. First operand 1118 states and 2103 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:04,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:04,035 INFO L93 Difference]: Finished difference Result 1538 states and 2754 transitions. [2021-08-06 19:28:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:28:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:28:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:04,053 INFO L225 Difference]: With dead ends: 1538 [2021-08-06 19:28:04,054 INFO L226 Difference]: Without dead ends: 1522 [2021-08-06 19:28:04,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:28:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2021-08-06 19:28:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1281. [2021-08-06 19:28:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 1.89921875) internal successors, (2431), 1280 states have internal predecessors, (2431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 2431 transitions. [2021-08-06 19:28:04,080 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 2431 transitions. Word has length 25 [2021-08-06 19:28:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 2431 transitions. [2021-08-06 19:28:04,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 2431 transitions. [2021-08-06 19:28:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:28:04,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:04,083 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:04,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:04,304 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 19:28:04,305 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:04,305 INFO L82 PathProgramCache]: Analyzing trace with hash 955275885, now seen corresponding path program 15 times [2021-08-06 19:28:04,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:04,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593772668] [2021-08-06 19:28:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:04,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:04,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:04,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:04,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:04,452 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:04,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:04,477 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:04,496 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:04,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:04,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:04,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593772668] [2021-08-06 19:28:04,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593772668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:04,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118443501] [2021-08-06 19:28:04,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:04,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:04,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:04,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:04,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:28:04,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:28:04,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:04,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:05,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118443501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:05,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:05,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:28:05,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023391530] [2021-08-06 19:28:05,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:28:05,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:05,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:28:05,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:05,257 INFO L87 Difference]: Start difference. First operand 1281 states and 2431 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:05,819 INFO L93 Difference]: Finished difference Result 1492 states and 2739 transitions. [2021-08-06 19:28:05,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:28:05,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:28:05,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:05,825 INFO L225 Difference]: With dead ends: 1492 [2021-08-06 19:28:05,825 INFO L226 Difference]: Without dead ends: 1476 [2021-08-06 19:28:05,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:28:05,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2021-08-06 19:28:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1343. [2021-08-06 19:28:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 1.9061102831594634) internal successors, (2558), 1342 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 2558 transitions. [2021-08-06 19:28:05,851 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 2558 transitions. Word has length 25 [2021-08-06 19:28:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:05,852 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 2558 transitions. [2021-08-06 19:28:05,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 2558 transitions. [2021-08-06 19:28:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:28:05,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:05,854 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:05,880 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 19:28:06,068 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 19:28:06,069 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1318538281, now seen corresponding path program 16 times [2021-08-06 19:28:06,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:06,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466522649] [2021-08-06 19:28:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:06,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:06,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:06,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:06,216 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:06,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:06,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:06,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:06,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:06,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:06,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466522649] [2021-08-06 19:28:06,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466522649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276641600] [2021-08-06 19:28:06,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:06,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:06,289 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:06,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:28:06,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:07,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276641600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:07,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:07,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:28:07,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316872130] [2021-08-06 19:28:07,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:28:07,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:07,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:28:07,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:07,014 INFO L87 Difference]: Start difference. First operand 1343 states and 2558 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:07,445 INFO L93 Difference]: Finished difference Result 1512 states and 2803 transitions. [2021-08-06 19:28:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:28:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:28:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:07,449 INFO L225 Difference]: With dead ends: 1512 [2021-08-06 19:28:07,450 INFO L226 Difference]: Without dead ends: 1506 [2021-08-06 19:28:07,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:28:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-08-06 19:28:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1387. [2021-08-06 19:28:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1386 states have (on average 1.9105339105339105) internal successors, (2648), 1386 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 2648 transitions. [2021-08-06 19:28:07,476 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 2648 transitions. Word has length 25 [2021-08-06 19:28:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:07,477 INFO L470 AbstractCegarLoop]: Abstraction has 1387 states and 2648 transitions. [2021-08-06 19:28:07,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 2648 transitions. [2021-08-06 19:28:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:28:07,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:07,479 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:07,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:07,700 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 19:28:07,700 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:07,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1941392241, now seen corresponding path program 17 times [2021-08-06 19:28:07,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:07,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113815267] [2021-08-06 19:28:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:07,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:07,817 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:07,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:07,843 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:07,846 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:07,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:07,873 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:07,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:07,896 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:07,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:07,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113815267] [2021-08-06 19:28:07,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113815267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:07,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214792842] [2021-08-06 19:28:07,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:07,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:07,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:07,917 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:07,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:28:08,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:28:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:08,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:08,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:08,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214792842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:08,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:08,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:28:08,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494666423] [2021-08-06 19:28:08,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:28:08,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:28:08,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:08,722 INFO L87 Difference]: Start difference. First operand 1387 states and 2648 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:09,249 INFO L93 Difference]: Finished difference Result 1628 states and 3015 transitions. [2021-08-06 19:28:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:28:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:28:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:09,256 INFO L225 Difference]: With dead ends: 1628 [2021-08-06 19:28:09,256 INFO L226 Difference]: Without dead ends: 1612 [2021-08-06 19:28:09,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:28:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-08-06 19:28:09,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1450. [2021-08-06 19:28:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 1449 states have (on average 1.9178743961352658) internal successors, (2779), 1449 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2779 transitions. [2021-08-06 19:28:09,282 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2779 transitions. Word has length 25 [2021-08-06 19:28:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:09,283 INFO L470 AbstractCegarLoop]: Abstraction has 1450 states and 2779 transitions. [2021-08-06 19:28:09,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2779 transitions. [2021-08-06 19:28:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:28:09,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:09,285 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:09,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:09,502 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 19:28:09,503 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1509015049, now seen corresponding path program 18 times [2021-08-06 19:28:09,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:09,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903600374] [2021-08-06 19:28:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:09,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:09,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:09,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903600374] [2021-08-06 19:28:09,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903600374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:09,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362326209] [2021-08-06 19:28:09,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:09,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:09,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:09,552 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:09,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:28:09,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:28:09,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 19:28:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:10,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362326209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:10,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:10,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-08-06 19:28:10,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551259992] [2021-08-06 19:28:10,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:28:10,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:10,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:28:10,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:28:10,109 INFO L87 Difference]: Start difference. First operand 1450 states and 2779 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:10,172 INFO L93 Difference]: Finished difference Result 1479 states and 2590 transitions. [2021-08-06 19:28:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:28:10,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 26 [2021-08-06 19:28:10,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:10,176 INFO L225 Difference]: With dead ends: 1479 [2021-08-06 19:28:10,176 INFO L226 Difference]: Without dead ends: 1362 [2021-08-06 19:28:10,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:28:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-08-06 19:28:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 911. [2021-08-06 19:28:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 1.80989010989011) internal successors, (1647), 910 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1647 transitions. [2021-08-06 19:28:10,192 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1647 transitions. Word has length 26 [2021-08-06 19:28:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:10,192 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1647 transitions. [2021-08-06 19:28:10,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1647 transitions. [2021-08-06 19:28:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 19:28:10,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:10,194 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:10,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:10,416 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 19:28:10,417 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:10,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:10,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1893576932, now seen corresponding path program 4 times [2021-08-06 19:28:10,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:10,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436434290] [2021-08-06 19:28:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:10,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:10,476 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:28:10,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:28:10,519 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 19:28:10,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 19:28:10,547 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 19:28:10,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 19:28:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:10,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:10,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436434290] [2021-08-06 19:28:10,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436434290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:10,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795436860] [2021-08-06 19:28:10,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:10,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:10,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:10,559 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:28:10,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:10,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:10,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:28:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:11,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795436860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:11,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:11,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:28:11,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444186279] [2021-08-06 19:28:11,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:28:11,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:11,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:28:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:28:11,233 INFO L87 Difference]: Start difference. First operand 911 states and 1647 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 19:28:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:11,431 INFO L93 Difference]: Finished difference Result 982 states and 1745 transitions. [2021-08-06 19:28:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:28:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 26 [2021-08-06 19:28:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:11,434 INFO L225 Difference]: With dead ends: 982 [2021-08-06 19:28:11,434 INFO L226 Difference]: Without dead ends: 929 [2021-08-06 19:28:11,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-06 19:28:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 921. [2021-08-06 19:28:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 1.8054347826086956) internal successors, (1661), 920 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1661 transitions. [2021-08-06 19:28:11,447 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1661 transitions. Word has length 26 [2021-08-06 19:28:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:11,447 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1661 transitions. [2021-08-06 19:28:11,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 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 19:28:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1661 transitions. [2021-08-06 19:28:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:28:11,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:11,449 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:11,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:11,668 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 19:28:11,669 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1447097947, now seen corresponding path program 19 times [2021-08-06 19:28:11,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:11,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684664940] [2021-08-06 19:28:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:11,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:11,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:11,830 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:11,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:11,874 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:11,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:11,899 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:11,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:11,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:11,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:11,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684664940] [2021-08-06 19:28:11,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684664940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:11,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914968506] [2021-08-06 19:28:11,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:11,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:11,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:11,937 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:11,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:28:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:28:12,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:12,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914968506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:12,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:12,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-06 19:28:12,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115390589] [2021-08-06 19:28:12,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:28:12,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:28:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:28:12,851 INFO L87 Difference]: Start difference. First operand 921 states and 1661 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:13,586 INFO L93 Difference]: Finished difference Result 1145 states and 1978 transitions. [2021-08-06 19:28:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:28:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 19:28:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:13,599 INFO L225 Difference]: With dead ends: 1145 [2021-08-06 19:28:13,599 INFO L226 Difference]: Without dead ends: 1129 [2021-08-06 19:28:13,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:28:13,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-08-06 19:28:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 960. [2021-08-06 19:28:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.8175182481751824) internal successors, (1743), 959 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1743 transitions. [2021-08-06 19:28:13,611 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1743 transitions. Word has length 28 [2021-08-06 19:28:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:13,612 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1743 transitions. [2021-08-06 19:28:13,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1743 transitions. [2021-08-06 19:28:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:28:13,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:13,614 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:13,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-06 19:28:13,828 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 19:28:13,829 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:13,829 INFO L82 PathProgramCache]: Analyzing trace with hash -644844599, now seen corresponding path program 20 times [2021-08-06 19:28:13,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:13,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599015140] [2021-08-06 19:28:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:13,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:13,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:13,969 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:13,996 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:13,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:14,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:14,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:14,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:14,056 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:14,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:14,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599015140] [2021-08-06 19:28:14,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599015140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:14,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409803819] [2021-08-06 19:28:14,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:14,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:14,074 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:14,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:28:14,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:14,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:14,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:28:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:15,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409803819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:15,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:15,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-06 19:28:15,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856142999] [2021-08-06 19:28:15,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:28:15,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:15,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:28:15,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:28:15,044 INFO L87 Difference]: Start difference. First operand 960 states and 1743 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:15,838 INFO L93 Difference]: Finished difference Result 1129 states and 1987 transitions. [2021-08-06 19:28:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:28:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 19:28:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:15,841 INFO L225 Difference]: With dead ends: 1129 [2021-08-06 19:28:15,841 INFO L226 Difference]: Without dead ends: 1113 [2021-08-06 19:28:15,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:28:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-06 19:28:15,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 998. [2021-08-06 19:28:15,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 1.8254764292878636) internal successors, (1820), 997 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1820 transitions. [2021-08-06 19:28:15,857 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1820 transitions. Word has length 28 [2021-08-06 19:28:15,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:15,857 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 1820 transitions. [2021-08-06 19:28:15,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1820 transitions. [2021-08-06 19:28:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 19:28:15,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:15,859 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:15,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:16,072 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 19:28:16,072 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1267698559, now seen corresponding path program 21 times [2021-08-06 19:28:16,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:16,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162039390] [2021-08-06 19:28:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:16,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:16,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:16,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:16,223 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:16,247 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:16,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:16,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:16,274 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:16,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:16,295 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:16,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:16,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162039390] [2021-08-06 19:28:16,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162039390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:16,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786058036] [2021-08-06 19:28:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:16,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:16,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:16,312 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:16,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:28:16,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:28:16,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:28:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:17,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786058036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:17,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:17,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:28:17,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89383544] [2021-08-06 19:28:17,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:17,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:17,274 INFO L87 Difference]: Start difference. First operand 998 states and 1820 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:18,080 INFO L93 Difference]: Finished difference Result 1207 states and 2136 transitions. [2021-08-06 19:28:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:28:18,080 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 19:28:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:18,084 INFO L225 Difference]: With dead ends: 1207 [2021-08-06 19:28:18,085 INFO L226 Difference]: Without dead ends: 1191 [2021-08-06 19:28:18,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:28:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-06 19:28:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1060. [2021-08-06 19:28:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 1.838526912181303) internal successors, (1947), 1059 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1947 transitions. [2021-08-06 19:28:18,099 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1947 transitions. Word has length 28 [2021-08-06 19:28:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:18,100 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1947 transitions. [2021-08-06 19:28:18,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1947 transitions. [2021-08-06 19:28:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:28:18,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:18,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:18,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:18,305 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 19:28:18,305 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288499, now seen corresponding path program 22 times [2021-08-06 19:28:18,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:18,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408705385] [2021-08-06 19:28:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:18,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:18,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:18,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408705385] [2021-08-06 19:28:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408705385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:18,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982689824] [2021-08-06 19:28:18,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:18,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:18,339 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:18,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:28:18,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:28:18,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:19,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:28:19,013 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:28:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:19,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982689824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:19,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:19,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 19:28:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759358977] [2021-08-06 19:28:19,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:28:19,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:19,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:28:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:28:19,032 INFO L87 Difference]: Start difference. First operand 1060 states and 1947 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:19,095 INFO L93 Difference]: Finished difference Result 1295 states and 2290 transitions. [2021-08-06 19:28:19,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:28:19,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 19:28:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:19,099 INFO L225 Difference]: With dead ends: 1295 [2021-08-06 19:28:19,100 INFO L226 Difference]: Without dead ends: 1293 [2021-08-06 19:28:19,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-08-06 19:28:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1132. [2021-08-06 19:28:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.8178603006189213) internal successors, (2056), 1131 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 2056 transitions. [2021-08-06 19:28:19,116 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 2056 transitions. Word has length 29 [2021-08-06 19:28:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 2056 transitions. [2021-08-06 19:28:19,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 2056 transitions. [2021-08-06 19:28:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:28:19,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:19,118 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:19,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:19,324 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 19:28:19,325 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:19,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:19,325 INFO L82 PathProgramCache]: Analyzing trace with hash 519064680, now seen corresponding path program 23 times [2021-08-06 19:28:19,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:19,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39155105] [2021-08-06 19:28:19,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:19,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:28:19,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:19,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39155105] [2021-08-06 19:28:19,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39155105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:19,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343945641] [2021-08-06 19:28:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:19,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:19,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:19,393 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:19,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:28:19,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:28:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:19,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 19:28:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:28:20,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343945641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:20,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:20,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-08-06 19:28:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923815742] [2021-08-06 19:28:20,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:20,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:20,114 INFO L87 Difference]: Start difference. First operand 1132 states and 2056 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:20,200 INFO L93 Difference]: Finished difference Result 1113 states and 1953 transitions. [2021-08-06 19:28:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:28:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 29 [2021-08-06 19:28:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:20,202 INFO L225 Difference]: With dead ends: 1113 [2021-08-06 19:28:20,202 INFO L226 Difference]: Without dead ends: 1113 [2021-08-06 19:28:20,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:28:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-06 19:28:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 901. [2021-08-06 19:28:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 1.7833333333333334) internal successors, (1605), 900 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1605 transitions. [2021-08-06 19:28:20,215 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1605 transitions. Word has length 29 [2021-08-06 19:28:20,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:20,216 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 1605 transitions. [2021-08-06 19:28:20,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:20,216 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1605 transitions. [2021-08-06 19:28:20,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:28:20,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:20,217 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:20,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 19:28:20,420 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 19:28:20,421 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -126554981, now seen corresponding path program 5 times [2021-08-06 19:28:20,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:20,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737797083] [2021-08-06 19:28:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:20,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:20,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:20,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737797083] [2021-08-06 19:28:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737797083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:20,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540717123] [2021-08-06 19:28:20,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:20,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:20,489 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:20,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:28:21,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:28:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:28:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:21,163 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:28:21,163 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:28:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:21,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540717123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:21,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:21,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-06 19:28:21,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253950434] [2021-08-06 19:28:21,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:28:21,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:28:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:28:21,191 INFO L87 Difference]: Start difference. First operand 901 states and 1605 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:21,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:21,298 INFO L93 Difference]: Finished difference Result 1135 states and 1938 transitions. [2021-08-06 19:28:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:28:21,299 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 29 [2021-08-06 19:28:21,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:21,301 INFO L225 Difference]: With dead ends: 1135 [2021-08-06 19:28:21,301 INFO L226 Difference]: Without dead ends: 1135 [2021-08-06 19:28:21,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:28:21,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-08-06 19:28:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 938. [2021-08-06 19:28:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 1.75880469583778) internal successors, (1648), 937 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1648 transitions. [2021-08-06 19:28:21,311 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1648 transitions. Word has length 29 [2021-08-06 19:28:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:21,311 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1648 transitions. [2021-08-06 19:28:21,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1648 transitions. [2021-08-06 19:28:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 19:28:21,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:21,312 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:21,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:21,512 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 19:28:21,512 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:21,513 INFO L82 PathProgramCache]: Analyzing trace with hash 492196723, now seen corresponding path program 24 times [2021-08-06 19:28:21,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:21,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603301427] [2021-08-06 19:28:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:21,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:21,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:21,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603301427] [2021-08-06 19:28:21,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603301427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:21,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62878317] [2021-08-06 19:28:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:21,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:21,565 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:21,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:28:22,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:28:22,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:22,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:28:22,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:22,266 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:28:22,266 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:28:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:28:22,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62878317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:22,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:22,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-08-06 19:28:22,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637587516] [2021-08-06 19:28:22,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:28:22,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:22,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:28:22,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:28:22,286 INFO L87 Difference]: Start difference. First operand 938 states and 1648 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:22,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:22,350 INFO L93 Difference]: Finished difference Result 1170 states and 1965 transitions. [2021-08-06 19:28:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:28:22,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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 29 [2021-08-06 19:28:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:22,352 INFO L225 Difference]: With dead ends: 1170 [2021-08-06 19:28:22,352 INFO L226 Difference]: Without dead ends: 1170 [2021-08-06 19:28:22,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:28:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-08-06 19:28:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1004. [2021-08-06 19:28:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.7627118644067796) internal successors, (1768), 1003 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1768 transitions. [2021-08-06 19:28:22,365 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1768 transitions. Word has length 29 [2021-08-06 19:28:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:22,365 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1768 transitions. [2021-08-06 19:28:22,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1768 transitions. [2021-08-06 19:28:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:28:22,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:22,366 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:22,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 19:28:22,567 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 19:28:22,567 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 549423511, now seen corresponding path program 25 times [2021-08-06 19:28:22,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:22,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132696301] [2021-08-06 19:28:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:22,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:22,782 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:22,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:28:22,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:22,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132696301] [2021-08-06 19:28:22,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132696301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:22,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777342389] [2021-08-06 19:28:22,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:22,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:22,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:22,802 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:22,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:28:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:28:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:23,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777342389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:23,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:23,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:28:23,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121140661] [2021-08-06 19:28:23,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:28:23,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:23,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:28:23,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:28:23,949 INFO L87 Difference]: Start difference. First operand 1004 states and 1768 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:25,077 INFO L93 Difference]: Finished difference Result 1471 states and 2503 transitions. [2021-08-06 19:28:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 19:28:25,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:28:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:25,084 INFO L225 Difference]: With dead ends: 1471 [2021-08-06 19:28:25,084 INFO L226 Difference]: Without dead ends: 1455 [2021-08-06 19:28:25,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:28:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-06 19:28:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1139. [2021-08-06 19:28:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 1138 states have (on average 1.7961335676625658) internal successors, (2044), 1138 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 2044 transitions. [2021-08-06 19:28:25,102 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 2044 transitions. Word has length 31 [2021-08-06 19:28:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:25,103 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 2044 transitions. [2021-08-06 19:28:25,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 2044 transitions. [2021-08-06 19:28:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:28:25,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:25,104 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:25,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 19:28:25,317 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 19:28:25,318 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1031747689, now seen corresponding path program 26 times [2021-08-06 19:28:25,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:25,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769779059] [2021-08-06 19:28:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:25,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:25,451 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:28:25,453 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:28:25,469 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:28:25,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:28:25,487 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:25,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:28:25,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:25,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769779059] [2021-08-06 19:28:25,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769779059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:25,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974119046] [2021-08-06 19:28:25,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:25,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:25,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:25,504 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:25,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:28:26,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:26,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:26,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:28:26,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974119046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:26,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:26,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:28:26,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065535484] [2021-08-06 19:28:26,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:26,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:26,616 INFO L87 Difference]: Start difference. First operand 1139 states and 2044 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:27,488 INFO L93 Difference]: Finished difference Result 1391 states and 2423 transitions. [2021-08-06 19:28:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:28:27,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:28:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:27,491 INFO L225 Difference]: With dead ends: 1391 [2021-08-06 19:28:27,491 INFO L226 Difference]: Without dead ends: 1361 [2021-08-06 19:28:27,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=262, Invalid=1900, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 19:28:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-08-06 19:28:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1133. [2021-08-06 19:28:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 1.7932862190812722) internal successors, (2030), 1132 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2030 transitions. [2021-08-06 19:28:27,503 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2030 transitions. Word has length 31 [2021-08-06 19:28:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 2030 transitions. [2021-08-06 19:28:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2030 transitions. [2021-08-06 19:28:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:28:27,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:27,504 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:27,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-06 19:28:27,704 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 19:28:27,705 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1694652819, now seen corresponding path program 27 times [2021-08-06 19:28:27,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:27,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889876994] [2021-08-06 19:28:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:27,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:27,893 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:27,895 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:27,921 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:27,923 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:27,946 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:27,947 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:28:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:27,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889876994] [2021-08-06 19:28:27,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889876994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:27,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093301109] [2021-08-06 19:28:27,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:27,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:27,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:27,966 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:27,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:28:28,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:28:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:28:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:29,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093301109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:29,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:29,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:28:29,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282925293] [2021-08-06 19:28:29,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:28:29,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:28:29,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:28:29,177 INFO L87 Difference]: Start difference. First operand 1133 states and 2030 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:30,336 INFO L93 Difference]: Finished difference Result 1378 states and 2388 transitions. [2021-08-06 19:28:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:28:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:28:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:30,339 INFO L225 Difference]: With dead ends: 1378 [2021-08-06 19:28:30,339 INFO L226 Difference]: Without dead ends: 1366 [2021-08-06 19:28:30,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 845.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:28:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-08-06 19:28:30,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1162. [2021-08-06 19:28:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.8027562446167098) internal successors, (2093), 1161 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 2093 transitions. [2021-08-06 19:28:30,352 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 2093 transitions. Word has length 31 [2021-08-06 19:28:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:30,352 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 2093 transitions. [2021-08-06 19:28:30,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 2093 transitions. [2021-08-06 19:28:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 19:28:30,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:30,353 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:30,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 19:28:30,554 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 19:28:30,554 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1255275821, now seen corresponding path program 28 times [2021-08-06 19:28:30,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:30,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319560527] [2021-08-06 19:28:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:30,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:30,728 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:30,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.3 percent of original size [2021-08-06 19:28:30,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:30,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 90.0 percent of original size [2021-08-06 19:28:30,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:30,782 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 88.9 percent of original size [2021-08-06 19:28:30,804 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:30,805 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:28:30,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:30,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319560527] [2021-08-06 19:28:30,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319560527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:30,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299541954] [2021-08-06 19:28:30,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:30,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:30,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:30,825 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:30,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:28:31,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:31,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 19:28:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:32,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299541954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:32,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:32,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:28:32,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821263697] [2021-08-06 19:28:32,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:28:32,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:28:32,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:28:32,032 INFO L87 Difference]: Start difference. First operand 1162 states and 2093 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:32,953 INFO L93 Difference]: Finished difference Result 1301 states and 2298 transitions. [2021-08-06 19:28:32,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:28:32,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 19:28:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:32,955 INFO L225 Difference]: With dead ends: 1301 [2021-08-06 19:28:32,955 INFO L226 Difference]: Without dead ends: 1289 [2021-08-06 19:28:32,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 749.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:28:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-08-06 19:28:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1190. [2021-08-06 19:28:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 1.809924306139613) internal successors, (2152), 1189 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2152 transitions. [2021-08-06 19:28:32,967 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2152 transitions. Word has length 31 [2021-08-06 19:28:32,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:32,967 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 2152 transitions. [2021-08-06 19:28:32,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2152 transitions. [2021-08-06 19:28:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:32,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:32,969 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:32,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:33,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 19:28:33,170 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:33,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:33,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2109847652, now seen corresponding path program 29 times [2021-08-06 19:28:33,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:33,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132620211] [2021-08-06 19:28:33,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:33,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:33,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:33,335 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:33,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:33,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132620211] [2021-08-06 19:28:33,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132620211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:33,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762726860] [2021-08-06 19:28:33,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:33,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:33,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:33,351 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:33,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:28:34,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:28:34,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:34,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:34,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:34,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762726860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:34,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:34,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-08-06 19:28:34,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767777382] [2021-08-06 19:28:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:28:34,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:28:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:34,564 INFO L87 Difference]: Start difference. First operand 1190 states and 2152 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:34,864 INFO L93 Difference]: Finished difference Result 1641 states and 2852 transitions. [2021-08-06 19:28:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:28:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 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 32 [2021-08-06 19:28:34,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:34,867 INFO L225 Difference]: With dead ends: 1641 [2021-08-06 19:28:34,867 INFO L226 Difference]: Without dead ends: 1625 [2021-08-06 19:28:34,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2021-08-06 19:28:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1393. [2021-08-06 19:28:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.7880747126436782) internal successors, (2489), 1392 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2489 transitions. [2021-08-06 19:28:34,885 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2489 transitions. Word has length 32 [2021-08-06 19:28:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:34,885 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2489 transitions. [2021-08-06 19:28:34,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2489 transitions. [2021-08-06 19:28:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:34,886 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:34,886 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:34,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:35,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 19:28:35,087 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash 135330982, now seen corresponding path program 30 times [2021-08-06 19:28:35,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:35,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656200072] [2021-08-06 19:28:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:35,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:35,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:35,251 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:35,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:35,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656200072] [2021-08-06 19:28:35,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656200072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:35,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043140568] [2021-08-06 19:28:35,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:35,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:35,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:35,269 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:35,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:28:36,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:28:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:36,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:36,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043140568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:36,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:36,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 19:28:36,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463859965] [2021-08-06 19:28:36,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:28:36,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:28:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:28:36,558 INFO L87 Difference]: Start difference. First operand 1393 states and 2489 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:37,164 INFO L93 Difference]: Finished difference Result 2141 states and 3659 transitions. [2021-08-06 19:28:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:28:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 32 [2021-08-06 19:28:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:37,168 INFO L225 Difference]: With dead ends: 2141 [2021-08-06 19:28:37,168 INFO L226 Difference]: Without dead ends: 2119 [2021-08-06 19:28:37,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:28:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-08-06 19:28:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1830. [2021-08-06 19:28:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 1.7566976489885182) internal successors, (3213), 1829 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3213 transitions. [2021-08-06 19:28:37,196 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3213 transitions. Word has length 32 [2021-08-06 19:28:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:37,196 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 3213 transitions. [2021-08-06 19:28:37,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:37,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3213 transitions. [2021-08-06 19:28:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:37,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:37,199 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:37,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:37,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 19:28:37,425 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:37,425 INFO L82 PathProgramCache]: Analyzing trace with hash -175871908, now seen corresponding path program 31 times [2021-08-06 19:28:37,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:37,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659967681] [2021-08-06 19:28:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:37,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:37,665 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:37,666 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:37,690 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:37,691 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:37,716 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:37,717 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:37,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:37,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:37,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659967681] [2021-08-06 19:28:37,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659967681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:37,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990617768] [2021-08-06 19:28:37,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:37,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:37,741 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:37,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:28:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:39,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990617768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:39,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:39,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-06 19:28:39,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611781901] [2021-08-06 19:28:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:39,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:39,067 INFO L87 Difference]: Start difference. First operand 1830 states and 3213 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:39,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:39,827 INFO L93 Difference]: Finished difference Result 2141 states and 3665 transitions. [2021-08-06 19:28:39,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:28:39,827 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:39,831 INFO L225 Difference]: With dead ends: 2141 [2021-08-06 19:28:39,831 INFO L226 Difference]: Without dead ends: 2137 [2021-08-06 19:28:39,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:28:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-08-06 19:28:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1977. [2021-08-06 19:28:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 1.750506072874494) internal successors, (3459), 1976 states have internal predecessors, (3459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 3459 transitions. [2021-08-06 19:28:39,868 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 3459 transitions. Word has length 32 [2021-08-06 19:28:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:39,869 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 3459 transitions. [2021-08-06 19:28:39,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 3459 transitions. [2021-08-06 19:28:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:39,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:39,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:39,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:40,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:28:40,096 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:40,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1655776808, now seen corresponding path program 32 times [2021-08-06 19:28:40,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:40,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421273623] [2021-08-06 19:28:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:40,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:40,308 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:40,309 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:40,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:40,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:40,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:40,354 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:40,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:40,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421273623] [2021-08-06 19:28:40,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421273623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:40,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137806214] [2021-08-06 19:28:40,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:40,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:40,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:40,373 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:40,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:28:41,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:41,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:41,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137806214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:41,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:41,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-06 19:28:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249943343] [2021-08-06 19:28:41,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:41,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:41,654 INFO L87 Difference]: Start difference. First operand 1977 states and 3459 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:42,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:42,325 INFO L93 Difference]: Finished difference Result 2093 states and 3622 transitions. [2021-08-06 19:28:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:28:42,326 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:42,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:42,330 INFO L225 Difference]: With dead ends: 2093 [2021-08-06 19:28:42,330 INFO L226 Difference]: Without dead ends: 2089 [2021-08-06 19:28:42,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:28:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-06 19:28:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 2014. [2021-08-06 19:28:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 1.749130650769995) internal successors, (3521), 2013 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 3521 transitions. [2021-08-06 19:28:42,370 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 3521 transitions. Word has length 32 [2021-08-06 19:28:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:42,370 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 3521 transitions. [2021-08-06 19:28:42,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 3521 transitions. [2021-08-06 19:28:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:42,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:42,373 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:42,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:42,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 19:28:42,599 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1407979986, now seen corresponding path program 33 times [2021-08-06 19:28:42,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:42,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414051393] [2021-08-06 19:28:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:42,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:42,796 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:42,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:42,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:42,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:42,840 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:42,841 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:42,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:42,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414051393] [2021-08-06 19:28:42,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414051393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:42,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190358523] [2021-08-06 19:28:42,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:42,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:42,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:42,861 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:42,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:28:43,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:28:43,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:44,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190358523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:44,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:44,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-06 19:28:44,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155816337] [2021-08-06 19:28:44,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:44,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:44,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:44,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:44,194 INFO L87 Difference]: Start difference. First operand 2014 states and 3521 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:45,491 INFO L93 Difference]: Finished difference Result 2321 states and 3993 transitions. [2021-08-06 19:28:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:28:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:45,495 INFO L225 Difference]: With dead ends: 2321 [2021-08-06 19:28:45,496 INFO L226 Difference]: Without dead ends: 2317 [2021-08-06 19:28:45,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 990.8ms TimeCoverageRelationStatistics Valid=226, Invalid=1666, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:28:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-08-06 19:28:45,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2171. [2021-08-06 19:28:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2170 states have (on average 1.7465437788018434) internal successors, (3790), 2170 states have internal predecessors, (3790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3790 transitions. [2021-08-06 19:28:45,531 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3790 transitions. Word has length 32 [2021-08-06 19:28:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:45,532 INFO L470 AbstractCegarLoop]: Abstraction has 2171 states and 3790 transitions. [2021-08-06 19:28:45,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:45,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3790 transitions. [2021-08-06 19:28:45,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:45,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:45,535 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:45,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:45,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 19:28:45,761 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1654484704, now seen corresponding path program 34 times [2021-08-06 19:28:45,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:45,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625510149] [2021-08-06 19:28:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:45,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:45,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:28:45,978 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:28:45,999 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:28:46,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:28:46,021 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:46,022 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:46,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:46,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625510149] [2021-08-06 19:28:46,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625510149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:46,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978232719] [2021-08-06 19:28:46,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:28:46,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:46,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:46,042 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:46,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:28:46,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:28:46,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:46,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:47,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978232719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:47,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:47,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-06 19:28:47,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899555052] [2021-08-06 19:28:47,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:47,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:47,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:47,434 INFO L87 Difference]: Start difference. First operand 2171 states and 3790 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:48,450 INFO L93 Difference]: Finished difference Result 2872 states and 4869 transitions. [2021-08-06 19:28:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:28:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:48,454 INFO L225 Difference]: With dead ends: 2872 [2021-08-06 19:28:48,454 INFO L226 Difference]: Without dead ends: 2854 [2021-08-06 19:28:48,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 792.8ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:28:48,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-08-06 19:28:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2463. [2021-08-06 19:28:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 1.7367993501218522) internal successors, (4276), 2462 states have internal predecessors, (4276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 4276 transitions. [2021-08-06 19:28:48,487 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 4276 transitions. Word has length 32 [2021-08-06 19:28:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:48,487 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 4276 transitions. [2021-08-06 19:28:48,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 4276 transitions. [2021-08-06 19:28:48,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:48,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:48,490 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:48,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:48,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 19:28:48,705 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1282140500, now seen corresponding path program 35 times [2021-08-06 19:28:48,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:48,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42474212] [2021-08-06 19:28:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:48,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:48,928 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:48,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:48,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:48,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:48,973 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:48,974 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:48,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:48,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42474212] [2021-08-06 19:28:48,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42474212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:48,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988476570] [2021-08-06 19:28:48,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:28:48,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:48,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:48,993 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:48,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:28:49,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:28:49,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:50,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988476570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:50,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:50,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-08-06 19:28:50,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396399099] [2021-08-06 19:28:50,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:28:50,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:28:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:28:50,425 INFO L87 Difference]: Start difference. First operand 2463 states and 4276 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:51,437 INFO L93 Difference]: Finished difference Result 2654 states and 4573 transitions. [2021-08-06 19:28:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:28:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:51,440 INFO L225 Difference]: With dead ends: 2654 [2021-08-06 19:28:51,440 INFO L226 Difference]: Without dead ends: 2650 [2021-08-06 19:28:51,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:28:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-08-06 19:28:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2545. [2021-08-06 19:28:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2545 states, 2544 states have (on average 1.7401729559748427) internal successors, (4427), 2544 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2545 states to 2545 states and 4427 transitions. [2021-08-06 19:28:51,479 INFO L78 Accepts]: Start accepts. Automaton has 2545 states and 4427 transitions. Word has length 32 [2021-08-06 19:28:51,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:51,479 INFO L470 AbstractCegarLoop]: Abstraction has 2545 states and 4427 transitions. [2021-08-06 19:28:51,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2545 states and 4427 transitions. [2021-08-06 19:28:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:51,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:51,483 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:51,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:51,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:51,709 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash 684328106, now seen corresponding path program 36 times [2021-08-06 19:28:51,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:51,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984602033] [2021-08-06 19:28:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:51,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:51,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:51,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:28:51,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:51,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:28:52,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:52,006 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:28:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:52,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:52,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984602033] [2021-08-06 19:28:52,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984602033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:52,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627760782] [2021-08-06 19:28:52,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:28:52,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:52,026 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:52,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:28:52,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:28:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:52,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627760782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:53,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:53,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2021-08-06 19:28:53,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136485785] [2021-08-06 19:28:53,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:28:53,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:28:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:28:53,416 INFO L87 Difference]: Start difference. First operand 2545 states and 4427 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:54,499 INFO L93 Difference]: Finished difference Result 3192 states and 5415 transitions. [2021-08-06 19:28:54,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:28:54,500 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:54,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:54,503 INFO L225 Difference]: With dead ends: 3192 [2021-08-06 19:28:54,503 INFO L226 Difference]: Without dead ends: 3184 [2021-08-06 19:28:54,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:28:54,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-08-06 19:28:54,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2975. [2021-08-06 19:28:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 1.7360457296570275) internal successors, (5163), 2974 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 5163 transitions. [2021-08-06 19:28:54,534 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 5163 transitions. Word has length 32 [2021-08-06 19:28:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:54,534 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 5163 transitions. [2021-08-06 19:28:54,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:54,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 5163 transitions. [2021-08-06 19:28:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:54,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:54,537 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:54,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 19:28:54,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:54,740 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:54,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:54,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1415562446, now seen corresponding path program 37 times [2021-08-06 19:28:54,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:54,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418196328] [2021-08-06 19:28:54,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:54,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:54,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:54,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:54,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:54,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418196328] [2021-08-06 19:28:54,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418196328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:54,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255619459] [2021-08-06 19:28:54,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:28:54,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:54,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:54,924 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:54,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:28:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:55,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:55,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:56,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255619459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:56,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:56,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 19:28:56,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875850319] [2021-08-06 19:28:56,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:28:56,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:56,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:28:56,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:28:56,339 INFO L87 Difference]: Start difference. First operand 2975 states and 5163 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 19:28:56,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:56,877 INFO L93 Difference]: Finished difference Result 3230 states and 5549 transitions. [2021-08-06 19:28:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:28:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 32 [2021-08-06 19:28:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:56,881 INFO L225 Difference]: With dead ends: 3230 [2021-08-06 19:28:56,882 INFO L226 Difference]: Without dead ends: 3224 [2021-08-06 19:28:56,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:28:56,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-08-06 19:28:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 3062. [2021-08-06 19:28:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3062 states, 3061 states have (on average 1.7379941195687685) internal successors, (5320), 3061 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3062 states to 3062 states and 5320 transitions. [2021-08-06 19:28:56,915 INFO L78 Accepts]: Start accepts. Automaton has 3062 states and 5320 transitions. Word has length 32 [2021-08-06 19:28:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:56,915 INFO L470 AbstractCegarLoop]: Abstraction has 3062 states and 5320 transitions. [2021-08-06 19:28:56,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 19:28:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3062 states and 5320 transitions. [2021-08-06 19:28:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:56,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:56,919 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:56,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:28:57,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 19:28:57,137 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1646902244, now seen corresponding path program 38 times [2021-08-06 19:28:57,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:57,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854149284] [2021-08-06 19:28:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:57,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:57,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:57,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:57,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:57,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854149284] [2021-08-06 19:28:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854149284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:57,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24440047] [2021-08-06 19:28:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:28:57,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:57,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:57,353 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:57,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:28:58,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:28:58,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:28:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:28:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:28:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:28:58,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24440047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:58,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:28:58,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:28:58,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213368746] [2021-08-06 19:28:58,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:28:58,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:28:58,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:28:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:28:58,869 INFO L87 Difference]: Start difference. First operand 3062 states and 5320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:28:59,188 INFO L93 Difference]: Finished difference Result 3436 states and 5917 transitions. [2021-08-06 19:28:59,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:28:59,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:28:59,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:28:59,193 INFO L225 Difference]: With dead ends: 3436 [2021-08-06 19:28:59,193 INFO L226 Difference]: Without dead ends: 3424 [2021-08-06 19:28:59,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:28:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-08-06 19:28:59,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 3316. [2021-08-06 19:28:59,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3316 states, 3315 states have (on average 1.7396681749622926) internal successors, (5767), 3315 states have internal predecessors, (5767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:59,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3316 states to 3316 states and 5767 transitions. [2021-08-06 19:28:59,229 INFO L78 Accepts]: Start accepts. Automaton has 3316 states and 5767 transitions. Word has length 32 [2021-08-06 19:28:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:28:59,229 INFO L470 AbstractCegarLoop]: Abstraction has 3316 states and 5767 transitions. [2021-08-06 19:28:59,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:28:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3316 states and 5767 transitions. [2021-08-06 19:28:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:28:59,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:28:59,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:28:59,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 19:28:59,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 19:28:59,458 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:28:59,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:28:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1274558040, now seen corresponding path program 39 times [2021-08-06 19:28:59,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:28:59,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121256948] [2021-08-06 19:28:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:28:59,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:28:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:28:59,638 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:59,639 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:28:59,655 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:28:59,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:28:59,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121256948] [2021-08-06 19:28:59,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121256948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:28:59,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228905146] [2021-08-06 19:28:59,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:28:59,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:28:59,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:28:59,661 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:28:59,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:29:00,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:29:00,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:00,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:29:00,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:01,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228905146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:01,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:01,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:29:01,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505738414] [2021-08-06 19:29:01,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:29:01,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:29:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:29:01,213 INFO L87 Difference]: Start difference. First operand 3316 states and 5767 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:01,884 INFO L93 Difference]: Finished difference Result 3947 states and 6824 transitions. [2021-08-06 19:29:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:29:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 32 [2021-08-06 19:29:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:01,888 INFO L225 Difference]: With dead ends: 3947 [2021-08-06 19:29:01,888 INFO L226 Difference]: Without dead ends: 3943 [2021-08-06 19:29:01,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 451.5ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:29:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-08-06 19:29:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3524. [2021-08-06 19:29:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 1.739426625035481) internal successors, (6128), 3523 states have internal predecessors, (6128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 6128 transitions. [2021-08-06 19:29:01,929 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 6128 transitions. Word has length 32 [2021-08-06 19:29:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:01,929 INFO L470 AbstractCegarLoop]: Abstraction has 3524 states and 6128 transitions. [2021-08-06 19:29:01,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 6128 transitions. [2021-08-06 19:29:01,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:29:01,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:01,934 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:01,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:02,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 19:29:02,149 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:02,149 INFO L82 PathProgramCache]: Analyzing trace with hash 91996004, now seen corresponding path program 40 times [2021-08-06 19:29:02,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:02,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626966933] [2021-08-06 19:29:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:02,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:02,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:02,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:02,314 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:02,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:02,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626966933] [2021-08-06 19:29:02,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626966933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:02,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930933086] [2021-08-06 19:29:02,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:02,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:02,333 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:02,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:29:03,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:03,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:29:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:03,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930933086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:03,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:03,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 19:29:03,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249490842] [2021-08-06 19:29:03,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:29:03,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:03,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:29:03,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:29:03,952 INFO L87 Difference]: Start difference. First operand 3524 states and 6128 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:04,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:04,339 INFO L93 Difference]: Finished difference Result 3935 states and 6746 transitions. [2021-08-06 19:29:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:29:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:29:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:04,346 INFO L225 Difference]: With dead ends: 3935 [2021-08-06 19:29:04,346 INFO L226 Difference]: Without dead ends: 3923 [2021-08-06 19:29:04,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 326.3ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:29:04,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2021-08-06 19:29:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 3575. [2021-08-06 19:29:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3574 states have (on average 1.7392277560156688) internal successors, (6216), 3574 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 6216 transitions. [2021-08-06 19:29:04,406 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 6216 transitions. Word has length 32 [2021-08-06 19:29:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:04,406 INFO L470 AbstractCegarLoop]: Abstraction has 3575 states and 6216 transitions. [2021-08-06 19:29:04,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 6216 transitions. [2021-08-06 19:29:04,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:29:04,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:04,411 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:04,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:04,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:04,628 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:04,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:04,629 INFO L82 PathProgramCache]: Analyzing trace with hash 829490698, now seen corresponding path program 41 times [2021-08-06 19:29:04,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:04,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471324241] [2021-08-06 19:29:04,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:04,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:04,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:04,778 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:04,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:04,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471324241] [2021-08-06 19:29:04,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471324241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:04,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640419142] [2021-08-06 19:29:04,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:04,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:04,793 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:04,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:29:05,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:29:05,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:05,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:29:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:06,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640419142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:06,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:06,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:29:06,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454528624] [2021-08-06 19:29:06,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:29:06,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:29:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:29:06,386 INFO L87 Difference]: Start difference. First operand 3575 states and 6216 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:06,840 INFO L93 Difference]: Finished difference Result 4305 states and 7345 transitions. [2021-08-06 19:29:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:29:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 32 [2021-08-06 19:29:06,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:06,845 INFO L225 Difference]: With dead ends: 4305 [2021-08-06 19:29:06,845 INFO L226 Difference]: Without dead ends: 4295 [2021-08-06 19:29:06,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:29:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-08-06 19:29:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 3747. [2021-08-06 19:29:06,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3746 states have (on average 1.7386545648691938) internal successors, (6513), 3746 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 6513 transitions. [2021-08-06 19:29:06,892 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 6513 transitions. Word has length 32 [2021-08-06 19:29:06,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:06,892 INFO L470 AbstractCegarLoop]: Abstraction has 3747 states and 6513 transitions. [2021-08-06 19:29:06,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 6513 transitions. [2021-08-06 19:29:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:29:06,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:06,896 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:06,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:07,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 19:29:07,096 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1676618366, now seen corresponding path program 42 times [2021-08-06 19:29:07,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:07,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401451072] [2021-08-06 19:29:07,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:07,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:07,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:07,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:07,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:07,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:07,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401451072] [2021-08-06 19:29:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401451072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715532357] [2021-08-06 19:29:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:07,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:07,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:07,280 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:07,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:29:08,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:29:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:08,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:29:08,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:08,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715532357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:08,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:08,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 19:29:08,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450082998] [2021-08-06 19:29:08,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 19:29:08,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:08,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 19:29:08,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:08,895 INFO L87 Difference]: Start difference. First operand 3747 states and 6513 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:09,451 INFO L93 Difference]: Finished difference Result 4993 states and 8509 transitions. [2021-08-06 19:29:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:29:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 32 [2021-08-06 19:29:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:09,458 INFO L225 Difference]: With dead ends: 4993 [2021-08-06 19:29:09,458 INFO L226 Difference]: Without dead ends: 4981 [2021-08-06 19:29:09,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:29:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2021-08-06 19:29:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 4122. [2021-08-06 19:29:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 1.7430235379762193) internal successors, (7183), 4121 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 7183 transitions. [2021-08-06 19:29:09,514 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 7183 transitions. Word has length 32 [2021-08-06 19:29:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:09,514 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 7183 transitions. [2021-08-06 19:29:09,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:09,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 7183 transitions. [2021-08-06 19:29:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-06 19:29:09,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:09,518 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:09,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 19:29:09,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:09,718 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:09,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1997100312, now seen corresponding path program 43 times [2021-08-06 19:29:09,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:09,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990114939] [2021-08-06 19:29:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:09,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:09,909 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:09,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:09,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:09,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990114939] [2021-08-06 19:29:09,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990114939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:09,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355448321] [2021-08-06 19:29:09,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:09,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:09,933 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:09,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:29:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:29:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:11,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355448321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:11,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:11,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 19:29:11,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242588129] [2021-08-06 19:29:11,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:29:11,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:11,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:29:11,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:29:11,637 INFO L87 Difference]: Start difference. First operand 4122 states and 7183 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:11,968 INFO L93 Difference]: Finished difference Result 4443 states and 7680 transitions. [2021-08-06 19:29:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:29:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-06 19:29:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:11,974 INFO L225 Difference]: With dead ends: 4443 [2021-08-06 19:29:11,974 INFO L226 Difference]: Without dead ends: 4431 [2021-08-06 19:29:11,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:29:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-08-06 19:29:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 4128. [2021-08-06 19:29:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 1.7421856069784347) internal successors, (7190), 4127 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 7190 transitions. [2021-08-06 19:29:12,020 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 7190 transitions. Word has length 32 [2021-08-06 19:29:12,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:12,020 INFO L470 AbstractCegarLoop]: Abstraction has 4128 states and 7190 transitions. [2021-08-06 19:29:12,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:12,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 7190 transitions. [2021-08-06 19:29:12,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-06 19:29:12,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:12,023 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:12,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:29:12,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 19:29:12,225 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:12,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1651711039, now seen corresponding path program 6 times [2021-08-06 19:29:12,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:12,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472537458] [2021-08-06 19:29:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:12,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:12,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:29:12,302 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:29:12,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 19:29:12,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 19:29:12,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 19:29:12,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 19:29:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 19:29:12,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:12,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472537458] [2021-08-06 19:29:12,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472537458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:12,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114466974] [2021-08-06 19:29:12,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:12,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:12,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:12,372 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:12,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:29:13,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:29:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-06 19:29:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 19:29:13,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114466974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:13,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:13,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:29:13,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68463833] [2021-08-06 19:29:13,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:29:13,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:29:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:13,865 INFO L87 Difference]: Start difference. First operand 4128 states and 7190 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:14,125 INFO L93 Difference]: Finished difference Result 4216 states and 7314 transitions. [2021-08-06 19:29:14,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:29:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 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 33 [2021-08-06 19:29:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:14,130 INFO L225 Difference]: With dead ends: 4216 [2021-08-06 19:29:14,130 INFO L226 Difference]: Without dead ends: 4149 [2021-08-06 19:29:14,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:29:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-08-06 19:29:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 4137. [2021-08-06 19:29:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4137 states, 4136 states have (on average 1.7412959381044488) internal successors, (7202), 4136 states have internal predecessors, (7202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4137 states to 4137 states and 7202 transitions. [2021-08-06 19:29:14,173 INFO L78 Accepts]: Start accepts. Automaton has 4137 states and 7202 transitions. Word has length 33 [2021-08-06 19:29:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:14,173 INFO L470 AbstractCegarLoop]: Abstraction has 4137 states and 7202 transitions. [2021-08-06 19:29:14,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:14,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4137 states and 7202 transitions. [2021-08-06 19:29:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:14,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:14,179 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:14,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:14,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 19:29:14,383 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1015828072, now seen corresponding path program 44 times [2021-08-06 19:29:14,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:14,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964476177] [2021-08-06 19:29:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:14,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:29:14,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:14,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964476177] [2021-08-06 19:29:14,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964476177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:14,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732211336] [2021-08-06 19:29:14,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:14,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:14,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:14,473 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:14,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:29:15,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:15,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:29:15,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:29:15,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732211336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:15,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:15,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 19:29:15,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201979406] [2021-08-06 19:29:15,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:29:15,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:15,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:29:15,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:15,977 INFO L87 Difference]: Start difference. First operand 4137 states and 7202 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:16,153 INFO L93 Difference]: Finished difference Result 5548 states and 9307 transitions. [2021-08-06 19:29:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:29:16,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:29:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:16,159 INFO L225 Difference]: With dead ends: 5548 [2021-08-06 19:29:16,159 INFO L226 Difference]: Without dead ends: 5548 [2021-08-06 19:29:16,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 134.5ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:29:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5548 states. [2021-08-06 19:29:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5548 to 3497. [2021-08-06 19:29:16,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 1.705949656750572) internal successors, (5964), 3496 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 5964 transitions. [2021-08-06 19:29:16,204 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 5964 transitions. Word has length 35 [2021-08-06 19:29:16,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:16,204 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 5964 transitions. [2021-08-06 19:29:16,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 5964 transitions. [2021-08-06 19:29:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:16,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:16,208 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:16,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:16,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:16,414 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:16,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:16,414 INFO L82 PathProgramCache]: Analyzing trace with hash -162336096, now seen corresponding path program 45 times [2021-08-06 19:29:16,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:16,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699345022] [2021-08-06 19:29:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:16,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:29:16,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:16,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699345022] [2021-08-06 19:29:16,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699345022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:16,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34410223] [2021-08-06 19:29:16,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:16,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:16,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:16,507 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:16,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:29:17,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:29:17,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:29:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:29:17,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34410223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:17,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:17,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 19:29:17,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281053229] [2021-08-06 19:29:17,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:29:17,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:17,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:29:17,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:17,938 INFO L87 Difference]: Start difference. First operand 3497 states and 5964 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:18,081 INFO L93 Difference]: Finished difference Result 3368 states and 5546 transitions. [2021-08-06 19:29:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:29:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:29:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:18,084 INFO L225 Difference]: With dead ends: 3368 [2021-08-06 19:29:18,084 INFO L226 Difference]: Without dead ends: 3368 [2021-08-06 19:29:18,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2021-08-06 19:29:18,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3044. [2021-08-06 19:29:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 1.6625041077883667) internal successors, (5059), 3043 states have internal predecessors, (5059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 5059 transitions. [2021-08-06 19:29:18,112 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 5059 transitions. Word has length 35 [2021-08-06 19:29:18,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:18,112 INFO L470 AbstractCegarLoop]: Abstraction has 3044 states and 5059 transitions. [2021-08-06 19:29:18,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 5059 transitions. [2021-08-06 19:29:18,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:18,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:18,115 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:18,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 19:29:18,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 19:29:18,315 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash -163486637, now seen corresponding path program 46 times [2021-08-06 19:29:18,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:18,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333757360] [2021-08-06 19:29:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:18,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:18,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:18,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333757360] [2021-08-06 19:29:18,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333757360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:18,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086702139] [2021-08-06 19:29:18,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:18,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:18,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:18,365 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:18,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:29:19,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:19,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:19,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:19,802 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:29:19,802 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:29:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:19,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086702139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:19,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:19,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:29:19,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456580410] [2021-08-06 19:29:19,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:29:19,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:19,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:29:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:29:19,828 INFO L87 Difference]: Start difference. First operand 3044 states and 5059 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:19,893 INFO L93 Difference]: Finished difference Result 3952 states and 6352 transitions. [2021-08-06 19:29:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 19:29:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:19,899 INFO L225 Difference]: With dead ends: 3952 [2021-08-06 19:29:19,899 INFO L226 Difference]: Without dead ends: 3952 [2021-08-06 19:29:19,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-08-06 19:29:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3683. [2021-08-06 19:29:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.6469310157523085) internal successors, (6064), 3682 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6064 transitions. [2021-08-06 19:29:19,941 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6064 transitions. Word has length 35 [2021-08-06 19:29:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:19,941 INFO L470 AbstractCegarLoop]: Abstraction has 3683 states and 6064 transitions. [2021-08-06 19:29:19,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:19,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6064 transitions. [2021-08-06 19:29:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:19,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:19,944 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:19,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:20,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 19:29:20,145 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:20,145 INFO L82 PathProgramCache]: Analyzing trace with hash 479078527, now seen corresponding path program 47 times [2021-08-06 19:29:20,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:20,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320112088] [2021-08-06 19:29:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:20,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320112088] [2021-08-06 19:29:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320112088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011991366] [2021-08-06 19:29:20,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:20,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:20,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:20,196 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:20,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:29:21,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:29:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:21,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:21,599 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:21,600 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:29:21,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011991366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:21,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:21,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:29:21,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123236646] [2021-08-06 19:29:21,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:29:21,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:21,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:29:21,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:29:21,632 INFO L87 Difference]: Start difference. First operand 3683 states and 6064 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:21,689 INFO L93 Difference]: Finished difference Result 3948 states and 6344 transitions. [2021-08-06 19:29:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 19:29:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:21,693 INFO L225 Difference]: With dead ends: 3948 [2021-08-06 19:29:21,693 INFO L226 Difference]: Without dead ends: 3946 [2021-08-06 19:29:21,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3946 states. [2021-08-06 19:29:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3946 to 3683. [2021-08-06 19:29:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.6466594242259642) internal successors, (6063), 3682 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 6063 transitions. [2021-08-06 19:29:21,741 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 6063 transitions. Word has length 35 [2021-08-06 19:29:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:21,742 INFO L470 AbstractCegarLoop]: Abstraction has 3683 states and 6063 transitions. [2021-08-06 19:29:21,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 6063 transitions. [2021-08-06 19:29:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:21,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:21,745 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:21,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:21,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:21,969 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:21,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:21,969 INFO L82 PathProgramCache]: Analyzing trace with hash 468640979, now seen corresponding path program 48 times [2021-08-06 19:29:21,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:21,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830973291] [2021-08-06 19:29:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:21,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:29:22,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:22,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830973291] [2021-08-06 19:29:22,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830973291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:22,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519635824] [2021-08-06 19:29:22,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:22,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:22,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:22,014 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:22,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:29:23,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:29:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:23,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:23,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:23,514 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:23,515 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:29:23,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519635824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:23,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:23,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 19:29:23,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194342259] [2021-08-06 19:29:23,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:29:23,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:29:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:29:23,548 INFO L87 Difference]: Start difference. First operand 3683 states and 6063 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:23,621 INFO L93 Difference]: Finished difference Result 3962 states and 6363 transitions. [2021-08-06 19:29:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 19:29:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:23,625 INFO L225 Difference]: With dead ends: 3962 [2021-08-06 19:29:23,625 INFO L226 Difference]: Without dead ends: 3954 [2021-08-06 19:29:23,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-08-06 19:29:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3507. [2021-08-06 19:29:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3507 states, 3506 states have (on average 1.6437535653166002) internal successors, (5763), 3506 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3507 states to 3507 states and 5763 transitions. [2021-08-06 19:29:23,661 INFO L78 Accepts]: Start accepts. Automaton has 3507 states and 5763 transitions. Word has length 35 [2021-08-06 19:29:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:23,661 INFO L470 AbstractCegarLoop]: Abstraction has 3507 states and 5763 transitions. [2021-08-06 19:29:23,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3507 states and 5763 transitions. [2021-08-06 19:29:23,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:23,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:23,664 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:23,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 19:29:23,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:23,864 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:23,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:23,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1238706177, now seen corresponding path program 49 times [2021-08-06 19:29:23,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:23,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859798329] [2021-08-06 19:29:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:23,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:23,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:23,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859798329] [2021-08-06 19:29:23,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859798329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:23,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746093589] [2021-08-06 19:29:23,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:23,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:23,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:23,925 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:23,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:29:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:25,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:25,357 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:25,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:25,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746093589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:25,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:25,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:29:25,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608931930] [2021-08-06 19:29:25,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:29:25,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:25,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:29:25,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:25,390 INFO L87 Difference]: Start difference. First operand 3507 states and 5763 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:25,466 INFO L93 Difference]: Finished difference Result 3724 states and 5992 transitions. [2021-08-06 19:29:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:29:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 19:29:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:25,470 INFO L225 Difference]: With dead ends: 3724 [2021-08-06 19:29:25,470 INFO L226 Difference]: Without dead ends: 3710 [2021-08-06 19:29:25,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3710 states. [2021-08-06 19:29:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3710 to 3517. [2021-08-06 19:29:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3516 states have (on average 1.6430602957906713) internal successors, (5777), 3516 states have internal predecessors, (5777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 5777 transitions. [2021-08-06 19:29:25,522 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 5777 transitions. Word has length 35 [2021-08-06 19:29:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:25,522 INFO L470 AbstractCegarLoop]: Abstraction has 3517 states and 5777 transitions. [2021-08-06 19:29:25,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 5777 transitions. [2021-08-06 19:29:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:25,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:25,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:25,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:25,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:25,741 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1577987489, now seen corresponding path program 50 times [2021-08-06 19:29:25,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:25,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942655639] [2021-08-06 19:29:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:25,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:25,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:25,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:25,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942655639] [2021-08-06 19:29:25,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942655639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:25,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307323622] [2021-08-06 19:29:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:25,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:25,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:25,791 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:25,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:29:27,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:27,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:27,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:27,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:29:27,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:29:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:27,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307323622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:27,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:27,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:29:27,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682834841] [2021-08-06 19:29:27,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:29:27,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:27,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:29:27,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:29:27,275 INFO L87 Difference]: Start difference. First operand 3517 states and 5777 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:27,357 INFO L93 Difference]: Finished difference Result 3931 states and 6356 transitions. [2021-08-06 19:29:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 19:29:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:27,378 INFO L225 Difference]: With dead ends: 3931 [2021-08-06 19:29:27,379 INFO L226 Difference]: Without dead ends: 3931 [2021-08-06 19:29:27,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:29:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3931 states. [2021-08-06 19:29:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3755. [2021-08-06 19:29:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6307938199254128) internal successors, (6122), 3754 states have internal predecessors, (6122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6122 transitions. [2021-08-06 19:29:27,418 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6122 transitions. Word has length 35 [2021-08-06 19:29:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:27,418 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6122 transitions. [2021-08-06 19:29:27,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:27,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6122 transitions. [2021-08-06 19:29:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:27,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:27,421 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:27,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 19:29:27,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:29:27,622 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1070063413, now seen corresponding path program 51 times [2021-08-06 19:29:27,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:27,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533523275] [2021-08-06 19:29:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:27,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:27,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:27,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533523275] [2021-08-06 19:29:27,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533523275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:27,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138909246] [2021-08-06 19:29:27,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:27,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:27,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:27,668 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:27,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:29:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:29:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:29,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:29,161 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:29,162 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:29:29,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138909246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:29,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:29,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:29:29,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543757352] [2021-08-06 19:29:29,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:29:29,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:29:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:29:29,195 INFO L87 Difference]: Start difference. First operand 3755 states and 6122 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:29,247 INFO L93 Difference]: Finished difference Result 3881 states and 6254 transitions. [2021-08-06 19:29:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:29,248 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 19:29:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:29,251 INFO L225 Difference]: With dead ends: 3881 [2021-08-06 19:29:29,251 INFO L226 Difference]: Without dead ends: 3879 [2021-08-06 19:29:29,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-08-06 19:29:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3755. [2021-08-06 19:29:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6257325519445924) internal successors, (6103), 3754 states have internal predecessors, (6103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6103 transitions. [2021-08-06 19:29:29,292 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6103 transitions. Word has length 35 [2021-08-06 19:29:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:29,293 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6103 transitions. [2021-08-06 19:29:29,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6103 transitions. [2021-08-06 19:29:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:29,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:29,296 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:29,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:29,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 19:29:29,505 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1435807809, now seen corresponding path program 52 times [2021-08-06 19:29:29,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:29,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133897552] [2021-08-06 19:29:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:29,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:29,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:29,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133897552] [2021-08-06 19:29:29,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133897552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:29,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026833708] [2021-08-06 19:29:29,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:29,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:29,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:29,566 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:29,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:29:30,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:30,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:30,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:31,040 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:31,041 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:31,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026833708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:31,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:31,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-08-06 19:29:31,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307514251] [2021-08-06 19:29:31,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:29:31,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:31,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:29:31,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:29:31,075 INFO L87 Difference]: Start difference. First operand 3755 states and 6103 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:31,132 INFO L93 Difference]: Finished difference Result 3771 states and 6117 transitions. [2021-08-06 19:29:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:29:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:29:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:31,137 INFO L225 Difference]: With dead ends: 3771 [2021-08-06 19:29:31,137 INFO L226 Difference]: Without dead ends: 3769 [2021-08-06 19:29:31,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-08-06 19:29:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3755. [2021-08-06 19:29:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6217368140649973) internal successors, (6088), 3754 states have internal predecessors, (6088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6088 transitions. [2021-08-06 19:29:31,178 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6088 transitions. Word has length 35 [2021-08-06 19:29:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:31,178 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6088 transitions. [2021-08-06 19:29:31,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6088 transitions. [2021-08-06 19:29:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-06 19:29:31,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:31,181 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:31,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 19:29:31,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 19:29:31,382 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:31,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:31,382 INFO L82 PathProgramCache]: Analyzing trace with hash -853997741, now seen corresponding path program 53 times [2021-08-06 19:29:31,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:31,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163754293] [2021-08-06 19:29:31,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:31,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:31,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:31,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163754293] [2021-08-06 19:29:31,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163754293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:31,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099716116] [2021-08-06 19:29:31,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:31,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:31,448 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:31,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:29:32,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:29:32,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:32,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:32,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:32,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 19:29:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:29:32,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099716116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:32,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:32,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-08-06 19:29:32,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404875838] [2021-08-06 19:29:32,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:29:32,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:32,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:29:32,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:32,971 INFO L87 Difference]: Start difference. First operand 3755 states and 6088 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:33,040 INFO L93 Difference]: Finished difference Result 3865 states and 6202 transitions. [2021-08-06 19:29:33,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-06 19:29:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:33,044 INFO L225 Difference]: With dead ends: 3865 [2021-08-06 19:29:33,044 INFO L226 Difference]: Without dead ends: 3857 [2021-08-06 19:29:33,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-08-06 19:29:33,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 3755. [2021-08-06 19:29:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 1.6196057538625466) internal successors, (6080), 3754 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 6080 transitions. [2021-08-06 19:29:33,081 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 6080 transitions. Word has length 35 [2021-08-06 19:29:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:33,081 INFO L470 AbstractCegarLoop]: Abstraction has 3755 states and 6080 transitions. [2021-08-06 19:29:33,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 6080 transitions. [2021-08-06 19:29:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-06 19:29:33,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:33,084 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:33,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 19:29:33,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:33,301 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:33,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1706388312, now seen corresponding path program 7 times [2021-08-06 19:29:33,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:33,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230290395] [2021-08-06 19:29:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:33,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:33,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:33,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230290395] [2021-08-06 19:29:33,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230290395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:33,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284666122] [2021-08-06 19:29:33,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:33,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:33,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:33,415 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:33,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:29:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:34,923 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:29:34,924 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:29:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284666122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:34,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-06 19:29:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211150998] [2021-08-06 19:29:34,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:34,950 INFO L87 Difference]: Start difference. First operand 3755 states and 6080 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:35,096 INFO L93 Difference]: Finished difference Result 4353 states and 6943 transitions. [2021-08-06 19:29:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:29:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-06 19:29:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:35,102 INFO L225 Difference]: With dead ends: 4353 [2021-08-06 19:29:35,102 INFO L226 Difference]: Without dead ends: 4353 [2021-08-06 19:29:35,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:29:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2021-08-06 19:29:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 3808. [2021-08-06 19:29:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 1.6088783819280272) internal successors, (6125), 3807 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 6125 transitions. [2021-08-06 19:29:35,146 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 6125 transitions. Word has length 36 [2021-08-06 19:29:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:35,147 INFO L470 AbstractCegarLoop]: Abstraction has 3808 states and 6125 transitions. [2021-08-06 19:29:35,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 6125 transitions. [2021-08-06 19:29:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:35,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:35,150 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:35,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:35,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:35,351 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1952180308, now seen corresponding path program 54 times [2021-08-06 19:29:35,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:35,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840706815] [2021-08-06 19:29:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:35,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:35,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:35,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:35,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:35,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840706815] [2021-08-06 19:29:35,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840706815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:35,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507758610] [2021-08-06 19:29:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:35,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:35,629 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:35,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:29:37,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:29:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:37,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507758610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:37,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:37,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 19:29:37,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615194990] [2021-08-06 19:29:37,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:29:37,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:37,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:29:37,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:29:37,753 INFO L87 Difference]: Start difference. First operand 3808 states and 6125 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:38,563 INFO L93 Difference]: Finished difference Result 5293 states and 8408 transitions. [2021-08-06 19:29:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:29:38,563 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:29:38,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:38,569 INFO L225 Difference]: With dead ends: 5293 [2021-08-06 19:29:38,569 INFO L226 Difference]: Without dead ends: 5273 [2021-08-06 19:29:38,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:29:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5273 states. [2021-08-06 19:29:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5273 to 4532. [2021-08-06 19:29:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4532 states, 4531 states have (on average 1.633414257338336) internal successors, (7401), 4531 states have internal predecessors, (7401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 7401 transitions. [2021-08-06 19:29:38,639 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 7401 transitions. Word has length 38 [2021-08-06 19:29:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:38,640 INFO L470 AbstractCegarLoop]: Abstraction has 4532 states and 7401 transitions. [2021-08-06 19:29:38,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 7401 transitions. [2021-08-06 19:29:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:38,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:38,643 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:38,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 19:29:38,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 19:29:38,843 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash -652775076, now seen corresponding path program 55 times [2021-08-06 19:29:38,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:38,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415488716] [2021-08-06 19:29:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:38,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:39,068 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:39,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:39,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415488716] [2021-08-06 19:29:39,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415488716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:39,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951353511] [2021-08-06 19:29:39,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:39,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:39,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:39,093 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:29:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:40,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:41,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951353511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:41,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:41,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:29:41,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456817041] [2021-08-06 19:29:41,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:29:41,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:29:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:29:41,094 INFO L87 Difference]: Start difference. First operand 4532 states and 7401 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:41,634 INFO L93 Difference]: Finished difference Result 5044 states and 8194 transitions. [2021-08-06 19:29:41,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:29:41,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:29:41,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:41,640 INFO L225 Difference]: With dead ends: 5044 [2021-08-06 19:29:41,640 INFO L226 Difference]: Without dead ends: 5026 [2021-08-06 19:29:41,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:29:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-08-06 19:29:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 4803. [2021-08-06 19:29:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 1.6397334443981675) internal successors, (7874), 4802 states have internal predecessors, (7874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 7874 transitions. [2021-08-06 19:29:41,680 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 7874 transitions. Word has length 38 [2021-08-06 19:29:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:41,680 INFO L470 AbstractCegarLoop]: Abstraction has 4803 states and 7874 transitions. [2021-08-06 19:29:41,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 7874 transitions. [2021-08-06 19:29:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:41,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:41,683 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:41,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 19:29:41,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 19:29:41,883 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:41,884 INFO L82 PathProgramCache]: Analyzing trace with hash 434548782, now seen corresponding path program 56 times [2021-08-06 19:29:41,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:41,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65491430] [2021-08-06 19:29:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:41,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:42,110 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:42,111 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:42,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:42,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65491430] [2021-08-06 19:29:42,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65491430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:42,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286855232] [2021-08-06 19:29:42,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:42,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:42,130 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:42,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:29:43,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:43,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:44,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:44,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286855232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:44,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:44,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-06 19:29:44,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524776303] [2021-08-06 19:29:44,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:29:44,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:29:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:29:44,214 INFO L87 Difference]: Start difference. First operand 4803 states and 7874 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:44,962 INFO L93 Difference]: Finished difference Result 5891 states and 9595 transitions. [2021-08-06 19:29:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:29:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:29:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:44,970 INFO L225 Difference]: With dead ends: 5891 [2021-08-06 19:29:44,970 INFO L226 Difference]: Without dead ends: 5869 [2021-08-06 19:29:44,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 603.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:29:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5869 states. [2021-08-06 19:29:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5869 to 5086. [2021-08-06 19:29:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5086 states, 5085 states have (on average 1.6456243854473942) internal successors, (8368), 5085 states have internal predecessors, (8368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5086 states to 5086 states and 8368 transitions. [2021-08-06 19:29:45,029 INFO L78 Accepts]: Start accepts. Automaton has 5086 states and 8368 transitions. Word has length 38 [2021-08-06 19:29:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:45,029 INFO L470 AbstractCegarLoop]: Abstraction has 5086 states and 8368 transitions. [2021-08-06 19:29:45,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:45,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5086 states and 8368 transitions. [2021-08-06 19:29:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:45,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:45,033 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:45,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 19:29:45,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:45,234 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:45,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash 256256028, now seen corresponding path program 57 times [2021-08-06 19:29:45,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:45,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024706717] [2021-08-06 19:29:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:45,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:45,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:45,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:29:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:45,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:45,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024706717] [2021-08-06 19:29:45,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024706717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:45,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919411516] [2021-08-06 19:29:45,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:45,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:45,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:45,569 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:45,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:29:47,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:29:47,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:47,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919411516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:47,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:47,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:29:47,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126517874] [2021-08-06 19:29:47,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:29:47,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:47,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:29:47,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:29:47,709 INFO L87 Difference]: Start difference. First operand 5086 states and 8368 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:48,716 INFO L93 Difference]: Finished difference Result 7230 states and 11736 transitions. [2021-08-06 19:29:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:29:48,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:29:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:48,723 INFO L225 Difference]: With dead ends: 7230 [2021-08-06 19:29:48,723 INFO L226 Difference]: Without dead ends: 7212 [2021-08-06 19:29:48,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 677.1ms TimeCoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:29:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7212 states. [2021-08-06 19:29:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7212 to 5794. [2021-08-06 19:29:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5794 states, 5793 states have (on average 1.6599344035905403) internal successors, (9616), 5793 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5794 states to 5794 states and 9616 transitions. [2021-08-06 19:29:48,786 INFO L78 Accepts]: Start accepts. Automaton has 5794 states and 9616 transitions. Word has length 38 [2021-08-06 19:29:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:48,786 INFO L470 AbstractCegarLoop]: Abstraction has 5794 states and 9616 transitions. [2021-08-06 19:29:48,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5794 states and 9616 transitions. [2021-08-06 19:29:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:48,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:48,790 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:48,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:48,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 19:29:48,993 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash -622768028, now seen corresponding path program 58 times [2021-08-06 19:29:48,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:48,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084839713] [2021-08-06 19:29:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:48,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:49,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:29:49,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:29:49,288 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:29:49,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:29:49,314 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:29:49,315 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:29:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:49,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084839713] [2021-08-06 19:29:49,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084839713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:49,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813361083] [2021-08-06 19:29:49,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:49,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:49,337 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:49,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:29:50,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:51,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813361083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:51,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:51,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:29:51,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522765639] [2021-08-06 19:29:51,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:29:51,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:29:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:29:51,527 INFO L87 Difference]: Start difference. First operand 5794 states and 9616 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:52,652 INFO L93 Difference]: Finished difference Result 6017 states and 9939 transitions. [2021-08-06 19:29:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:29:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:29:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:52,658 INFO L225 Difference]: With dead ends: 6017 [2021-08-06 19:29:52,658 INFO L226 Difference]: Without dead ends: 6011 [2021-08-06 19:29:52,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 916.7ms TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:29:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-08-06 19:29:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 5885. [2021-08-06 19:29:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5885 states, 5884 states have (on average 1.6607749830047587) internal successors, (9772), 5884 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5885 states to 5885 states and 9772 transitions. [2021-08-06 19:29:52,707 INFO L78 Accepts]: Start accepts. Automaton has 5885 states and 9772 transitions. Word has length 38 [2021-08-06 19:29:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 5885 states and 9772 transitions. [2021-08-06 19:29:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 5885 states and 9772 transitions. [2021-08-06 19:29:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:52,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:52,712 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:52,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:52,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 19:29:52,925 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:52,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1121432800, now seen corresponding path program 59 times [2021-08-06 19:29:52,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:52,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879732263] [2021-08-06 19:29:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:52,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:53,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:29:53,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:29:53,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:29:53,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:29:53,250 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:29:53,251 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:29:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:53,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:53,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879732263] [2021-08-06 19:29:53,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879732263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:53,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730865497] [2021-08-06 19:29:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:53,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:53,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:53,273 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:53,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:29:54,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:29:54,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:54,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:54,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:55,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730865497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:55,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:55,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:29:55,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910286145] [2021-08-06 19:29:55,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:29:55,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:55,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:29:55,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:29:55,532 INFO L87 Difference]: Start difference. First operand 5885 states and 9772 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:56,845 INFO L93 Difference]: Finished difference Result 6011 states and 9953 transitions. [2021-08-06 19:29:56,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:29:56,845 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:29:56,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:56,852 INFO L225 Difference]: With dead ends: 6011 [2021-08-06 19:29:56,852 INFO L226 Difference]: Without dead ends: 6005 [2021-08-06 19:29:56,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1081.0ms TimeCoverageRelationStatistics Valid=185, Invalid=2071, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:29:56,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2021-08-06 19:29:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 5926. [2021-08-06 19:29:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.66126582278481) internal successors, (9843), 5925 states have internal predecessors, (9843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 9843 transitions. [2021-08-06 19:29:56,911 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 9843 transitions. Word has length 38 [2021-08-06 19:29:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:56,912 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 9843 transitions. [2021-08-06 19:29:56,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 9843 transitions. [2021-08-06 19:29:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:29:56,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:56,915 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:56,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 19:29:57,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 19:29:57,118 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:29:57,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:57,118 INFO L82 PathProgramCache]: Analyzing trace with hash 735424694, now seen corresponding path program 60 times [2021-08-06 19:29:57,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:57,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103914814] [2021-08-06 19:29:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:57,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:57,385 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:29:57,386 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:29:57,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:29:57,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:29:57,436 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:29:57,437 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:29:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:57,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:57,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103914814] [2021-08-06 19:29:57,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103914814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:57,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991923659] [2021-08-06 19:29:57,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:57,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:57,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:57,459 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:57,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:29:59,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:29:59,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:29:59,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:59,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991923659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:59,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:59,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:29:59,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638470326] [2021-08-06 19:29:59,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:29:59,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:29:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:29:59,723 INFO L87 Difference]: Start difference. First operand 5926 states and 9843 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:00,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:00,976 INFO L93 Difference]: Finished difference Result 6076 states and 10062 transitions. [2021-08-06 19:30:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:30:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:00,983 INFO L225 Difference]: With dead ends: 6076 [2021-08-06 19:30:00,983 INFO L226 Difference]: Without dead ends: 6070 [2021-08-06 19:30:00,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 992.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1901, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 19:30:00,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2021-08-06 19:30:01,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 5969. [2021-08-06 19:30:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5969 states, 5968 states have (on average 1.6616957104557641) internal successors, (9917), 5968 states have internal predecessors, (9917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5969 states to 5969 states and 9917 transitions. [2021-08-06 19:30:01,040 INFO L78 Accepts]: Start accepts. Automaton has 5969 states and 9917 transitions. Word has length 38 [2021-08-06 19:30:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:01,040 INFO L470 AbstractCegarLoop]: Abstraction has 5969 states and 9917 transitions. [2021-08-06 19:30:01,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5969 states and 9917 transitions. [2021-08-06 19:30:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:01,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:01,045 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:01,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 19:30:01,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 19:30:01,272 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -198232928, now seen corresponding path program 61 times [2021-08-06 19:30:01,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:01,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767350551] [2021-08-06 19:30:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:01,272 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:01,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:01,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:01,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:01,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:01,600 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:01,602 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:01,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:01,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767350551] [2021-08-06 19:30:01,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767350551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:01,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467507180] [2021-08-06 19:30:01,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:01,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:01,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:01,624 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:01,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:30:03,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:03,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467507180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:03,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:30:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595584154] [2021-08-06 19:30:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:30:03,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:03,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:30:03,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:30:03,956 INFO L87 Difference]: Start difference. First operand 5969 states and 9917 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:05,926 INFO L93 Difference]: Finished difference Result 6746 states and 11151 transitions. [2021-08-06 19:30:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 19:30:05,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:05,934 INFO L225 Difference]: With dead ends: 6746 [2021-08-06 19:30:05,934 INFO L226 Difference]: Without dead ends: 6734 [2021-08-06 19:30:05,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1385.2ms TimeCoverageRelationStatistics Valid=287, Invalid=3135, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 19:30:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6734 states. [2021-08-06 19:30:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6734 to 6112. [2021-08-06 19:30:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 1.6633938798887253) internal successors, (10165), 6111 states have internal predecessors, (10165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:05,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 10165 transitions. [2021-08-06 19:30:05,998 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 10165 transitions. Word has length 38 [2021-08-06 19:30:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:05,998 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 10165 transitions. [2021-08-06 19:30:05,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:05,999 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 10165 transitions. [2021-08-06 19:30:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:06,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:06,003 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:06,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 19:30:06,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:06,203 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:06,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:06,204 INFO L82 PathProgramCache]: Analyzing trace with hash -7954770, now seen corresponding path program 62 times [2021-08-06 19:30:06,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:06,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649330989] [2021-08-06 19:30:06,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:06,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:06,456 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:06,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:06,481 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:06,483 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:06,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:06,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:06,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:06,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649330989] [2021-08-06 19:30:06,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649330989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:06,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519740951] [2021-08-06 19:30:06,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:06,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:06,532 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:06,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:30:08,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:08,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:08,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519740951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:08,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:08,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:30:08,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701105252] [2021-08-06 19:30:08,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:30:08,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:08,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:30:08,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:30:08,874 INFO L87 Difference]: Start difference. First operand 6112 states and 10165 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:09,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:09,979 INFO L93 Difference]: Finished difference Result 6315 states and 10470 transitions. [2021-08-06 19:30:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:30:09,980 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:09,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:09,989 INFO L225 Difference]: With dead ends: 6315 [2021-08-06 19:30:09,989 INFO L226 Difference]: Without dead ends: 6303 [2021-08-06 19:30:09,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 899.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:30:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-08-06 19:30:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 6195. [2021-08-06 19:30:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6195 states, 6194 states have (on average 1.6645140458508234) internal successors, (10310), 6194 states have internal predecessors, (10310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6195 states to 6195 states and 10310 transitions. [2021-08-06 19:30:10,060 INFO L78 Accepts]: Start accepts. Automaton has 6195 states and 10310 transitions. Word has length 38 [2021-08-06 19:30:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:10,060 INFO L470 AbstractCegarLoop]: Abstraction has 6195 states and 10310 transitions. [2021-08-06 19:30:10,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6195 states and 10310 transitions. [2021-08-06 19:30:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:10,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:10,065 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:10,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 19:30:10,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:10,265 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash 613293848, now seen corresponding path program 63 times [2021-08-06 19:30:10,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:10,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377874500] [2021-08-06 19:30:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:10,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:10,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:10,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:30:10,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 72.0 percent of original size [2021-08-06 19:30:10,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:30:10,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:30:10,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:10,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:10,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:10,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377874500] [2021-08-06 19:30:10,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377874500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:10,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299882400] [2021-08-06 19:30:10,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:10,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:10,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:10,632 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:10,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 19:30:12,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:30:12,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:12,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:12,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299882400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:12,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:12,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:30:12,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288402819] [2021-08-06 19:30:12,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:30:12,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:30:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:30:12,995 INFO L87 Difference]: Start difference. First operand 6195 states and 10310 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:15,409 INFO L93 Difference]: Finished difference Result 6931 states and 11393 transitions. [2021-08-06 19:30:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 19:30:15,409 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:15,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:15,417 INFO L225 Difference]: With dead ends: 6931 [2021-08-06 19:30:15,418 INFO L226 Difference]: Without dead ends: 6913 [2021-08-06 19:30:15,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=385, Invalid=4585, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 19:30:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6913 states. [2021-08-06 19:30:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6913 to 6329. [2021-08-06 19:30:15,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6329 states, 6328 states have (on average 1.668299620733249) internal successors, (10557), 6328 states have internal predecessors, (10557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6329 states to 6329 states and 10557 transitions. [2021-08-06 19:30:15,484 INFO L78 Accepts]: Start accepts. Automaton has 6329 states and 10557 transitions. Word has length 38 [2021-08-06 19:30:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:15,484 INFO L470 AbstractCegarLoop]: Abstraction has 6329 states and 10557 transitions. [2021-08-06 19:30:15,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6329 states and 10557 transitions. [2021-08-06 19:30:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:15,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:15,489 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:15,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:15,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:15,693 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash 729539924, now seen corresponding path program 64 times [2021-08-06 19:30:15,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:15,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370994024] [2021-08-06 19:30:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:15,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:16,097 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:30:16,099 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 70.8 percent of original size [2021-08-06 19:30:16,130 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:16,131 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:16,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:16,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370994024] [2021-08-06 19:30:16,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370994024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:16,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956383074] [2021-08-06 19:30:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:16,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:16,163 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:16,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 19:30:17,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:18,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956383074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:18,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:18,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:30:18,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004362434] [2021-08-06 19:30:18,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:30:18,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:30:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:30:18,602 INFO L87 Difference]: Start difference. First operand 6329 states and 10557 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:20,591 INFO L93 Difference]: Finished difference Result 8364 states and 13709 transitions. [2021-08-06 19:30:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 19:30:20,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:20,602 INFO L225 Difference]: With dead ends: 8364 [2021-08-06 19:30:20,602 INFO L226 Difference]: Without dead ends: 8342 [2021-08-06 19:30:20,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1336.0ms TimeCoverageRelationStatistics Valid=279, Invalid=3027, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 19:30:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8342 states. [2021-08-06 19:30:20,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8342 to 7176. [2021-08-06 19:30:20,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7176 states, 7175 states have (on average 1.6780487804878048) internal successors, (12040), 7175 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7176 states to 7176 states and 12040 transitions. [2021-08-06 19:30:20,683 INFO L78 Accepts]: Start accepts. Automaton has 7176 states and 12040 transitions. Word has length 38 [2021-08-06 19:30:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:20,683 INFO L470 AbstractCegarLoop]: Abstraction has 7176 states and 12040 transitions. [2021-08-06 19:30:20,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7176 states and 12040 transitions. [2021-08-06 19:30:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:20,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:20,688 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:20,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:20,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 19:30:20,888 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1386389434, now seen corresponding path program 65 times [2021-08-06 19:30:20,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:20,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428240048] [2021-08-06 19:30:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:20,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:21,168 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:21,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:21,198 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:21,199 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:21,228 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:21,229 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:21,250 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:21,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:21,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428240048] [2021-08-06 19:30:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428240048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:21,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348816236] [2021-08-06 19:30:21,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:21,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:21,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:21,252 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 19:30:23,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:30:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:23,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:23,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348816236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:23,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:23,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 19:30:23,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571376536] [2021-08-06 19:30:23,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:30:23,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:23,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:30:23,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:30:23,819 INFO L87 Difference]: Start difference. First operand 7176 states and 12040 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:25,806 INFO L93 Difference]: Finished difference Result 7625 states and 12723 transitions. [2021-08-06 19:30:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 19:30:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:25,815 INFO L225 Difference]: With dead ends: 7625 [2021-08-06 19:30:25,815 INFO L226 Difference]: Without dead ends: 7619 [2021-08-06 19:30:25,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1407.4ms TimeCoverageRelationStatistics Valid=282, Invalid=3258, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 19:30:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7619 states. [2021-08-06 19:30:25,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7619 to 7211. [2021-08-06 19:30:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7211 states, 7210 states have (on average 1.6786407766990292) internal successors, (12103), 7210 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7211 states to 7211 states and 12103 transitions. [2021-08-06 19:30:25,895 INFO L78 Accepts]: Start accepts. Automaton has 7211 states and 12103 transitions. Word has length 38 [2021-08-06 19:30:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:25,895 INFO L470 AbstractCegarLoop]: Abstraction has 7211 states and 12103 transitions. [2021-08-06 19:30:25,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 7211 states and 12103 transitions. [2021-08-06 19:30:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:25,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:25,900 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:25,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:26,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:26,100 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:26,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:26,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1108231004, now seen corresponding path program 66 times [2021-08-06 19:30:26,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:26,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279832237] [2021-08-06 19:30:26,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:26,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:26,349 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:26,350 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:26,374 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:26,376 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:26,410 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:26,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:26,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:26,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279832237] [2021-08-06 19:30:26,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279832237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:26,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390331786] [2021-08-06 19:30:26,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:26,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:26,434 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:26,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 19:30:28,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:30:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:29,006 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:29,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390331786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:29,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:29,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-08-06 19:30:29,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143419070] [2021-08-06 19:30:29,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:30:29,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:29,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:30:29,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:30:29,008 INFO L87 Difference]: Start difference. First operand 7211 states and 12103 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:30,654 INFO L93 Difference]: Finished difference Result 7497 states and 12536 transitions. [2021-08-06 19:30:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:30:30,654 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:30,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:30,663 INFO L225 Difference]: With dead ends: 7497 [2021-08-06 19:30:30,663 INFO L226 Difference]: Without dead ends: 7491 [2021-08-06 19:30:30,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=192, Invalid=2258, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:30:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7491 states. [2021-08-06 19:30:30,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7491 to 7292. [2021-08-06 19:30:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7292 states, 7291 states have (on average 1.6791935262652586) internal successors, (12243), 7291 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7292 states to 7292 states and 12243 transitions. [2021-08-06 19:30:30,741 INFO L78 Accepts]: Start accepts. Automaton has 7292 states and 12243 transitions. Word has length 38 [2021-08-06 19:30:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:30,742 INFO L470 AbstractCegarLoop]: Abstraction has 7292 states and 12243 transitions. [2021-08-06 19:30:30,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 7292 states and 12243 transitions. [2021-08-06 19:30:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:30,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:30,746 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:30,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 19:30:30,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:30,949 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2060306596, now seen corresponding path program 67 times [2021-08-06 19:30:30,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:30,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047156829] [2021-08-06 19:30:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:30,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:31,301 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:31,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 75.0 percent of original size [2021-08-06 19:30:31,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:31,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 73.9 percent of original size [2021-08-06 19:30:31,363 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:31,364 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:30:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:31,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:31,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047156829] [2021-08-06 19:30:31,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047156829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:31,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135363906] [2021-08-06 19:30:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:31,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:31,393 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:31,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 19:30:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:33,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:34,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135363906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:34,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:34,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2021-08-06 19:30:34,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467529354] [2021-08-06 19:30:34,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:30:34,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:34,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:30:34,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:30:34,028 INFO L87 Difference]: Start difference. First operand 7292 states and 12243 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:35,302 INFO L93 Difference]: Finished difference Result 7411 states and 12413 transitions. [2021-08-06 19:30:35,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:30:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:35,310 INFO L225 Difference]: With dead ends: 7411 [2021-08-06 19:30:35,310 INFO L226 Difference]: Without dead ends: 7405 [2021-08-06 19:30:35,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1044.1ms TimeCoverageRelationStatistics Valid=180, Invalid=2076, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:30:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7405 states. [2021-08-06 19:30:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7405 to 7330. [2021-08-06 19:30:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7330 states, 7329 states have (on average 1.6796288716059489) internal successors, (12310), 7329 states have internal predecessors, (12310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7330 states to 7330 states and 12310 transitions. [2021-08-06 19:30:35,387 INFO L78 Accepts]: Start accepts. Automaton has 7330 states and 12310 transitions. Word has length 38 [2021-08-06 19:30:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:35,387 INFO L470 AbstractCegarLoop]: Abstraction has 7330 states and 12310 transitions. [2021-08-06 19:30:35,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 7330 states and 12310 transitions. [2021-08-06 19:30:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:35,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:35,392 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:35,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:35,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 19:30:35,593 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:35,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:35,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2093952740, now seen corresponding path program 68 times [2021-08-06 19:30:35,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:35,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211538062] [2021-08-06 19:30:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:35,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:35,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:35,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:35,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:35,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211538062] [2021-08-06 19:30:35,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211538062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:35,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445960656] [2021-08-06 19:30:35,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:35,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:35,858 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:35,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 19:30:37,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:37,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:37,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:37,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:38,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445960656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:38,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:38,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:30:38,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591337005] [2021-08-06 19:30:38,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:30:38,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:30:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:30:38,380 INFO L87 Difference]: Start difference. First operand 7330 states and 12310 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:38,911 INFO L93 Difference]: Finished difference Result 7418 states and 12438 transitions. [2021-08-06 19:30:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:30:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:38,919 INFO L225 Difference]: With dead ends: 7418 [2021-08-06 19:30:38,919 INFO L226 Difference]: Without dead ends: 7412 [2021-08-06 19:30:38,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:30:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2021-08-06 19:30:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 7362. [2021-08-06 19:30:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7362 states, 7361 states have (on average 1.6802064936829235) internal successors, (12368), 7361 states have internal predecessors, (12368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:39,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7362 states to 7362 states and 12368 transitions. [2021-08-06 19:30:39,026 INFO L78 Accepts]: Start accepts. Automaton has 7362 states and 12368 transitions. Word has length 38 [2021-08-06 19:30:39,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:39,026 INFO L470 AbstractCegarLoop]: Abstraction has 7362 states and 12368 transitions. [2021-08-06 19:30:39,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:39,026 INFO L276 IsEmpty]: Start isEmpty. Operand 7362 states and 12368 transitions. [2021-08-06 19:30:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:39,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:39,031 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:39,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:39,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 19:30:39,232 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1707944634, now seen corresponding path program 69 times [2021-08-06 19:30:39,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:39,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659811146] [2021-08-06 19:30:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:39,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:39,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:39,493 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:39,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:39,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659811146] [2021-08-06 19:30:39,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659811146] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:39,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518644478] [2021-08-06 19:30:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:39,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:39,512 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 19:30:41,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:30:41,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:30:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518644478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:42,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:30:42,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918006515] [2021-08-06 19:30:42,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:30:42,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:30:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:30:42,026 INFO L87 Difference]: Start difference. First operand 7362 states and 12368 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:43,169 INFO L93 Difference]: Finished difference Result 8233 states and 13722 transitions. [2021-08-06 19:30:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:30:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:43,177 INFO L225 Difference]: With dead ends: 8233 [2021-08-06 19:30:43,178 INFO L226 Difference]: Without dead ends: 8221 [2021-08-06 19:30:43,178 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 639.8ms TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:30:43,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8221 states. [2021-08-06 19:30:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8221 to 7551. [2021-08-06 19:30:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7551 states, 7550 states have (on average 1.6819867549668874) internal successors, (12699), 7550 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 12699 transitions. [2021-08-06 19:30:43,260 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 12699 transitions. Word has length 38 [2021-08-06 19:30:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:43,260 INFO L470 AbstractCegarLoop]: Abstraction has 7551 states and 12699 transitions. [2021-08-06 19:30:43,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:43,260 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 12699 transitions. [2021-08-06 19:30:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:43,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:43,265 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:43,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 19:30:43,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:43,466 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:43,467 INFO L82 PathProgramCache]: Analyzing trace with hash 774287012, now seen corresponding path program 70 times [2021-08-06 19:30:43,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:43,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701980254] [2021-08-06 19:30:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:43,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:43,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:43,674 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:43,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:43,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701980254] [2021-08-06 19:30:43,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701980254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:43,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477889492] [2021-08-06 19:30:43,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:43,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:43,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:43,692 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:43,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 19:30:45,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:45,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:45,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:46,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477889492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:46,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:46,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:30:46,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117769355] [2021-08-06 19:30:46,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:30:46,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:46,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:30:46,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:30:46,331 INFO L87 Difference]: Start difference. First operand 7551 states and 12699 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:47,221 INFO L93 Difference]: Finished difference Result 8072 states and 13526 transitions. [2021-08-06 19:30:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:30:47,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:47,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:47,230 INFO L225 Difference]: With dead ends: 8072 [2021-08-06 19:30:47,230 INFO L226 Difference]: Without dead ends: 8060 [2021-08-06 19:30:47,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 674.9ms TimeCoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:30:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-08-06 19:30:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 7630. [2021-08-06 19:30:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7630 states, 7629 states have (on average 1.6825271988465067) internal successors, (12836), 7629 states have internal predecessors, (12836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7630 states to 7630 states and 12836 transitions. [2021-08-06 19:30:47,311 INFO L78 Accepts]: Start accepts. Automaton has 7630 states and 12836 transitions. Word has length 38 [2021-08-06 19:30:47,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:47,312 INFO L470 AbstractCegarLoop]: Abstraction has 7630 states and 12836 transitions. [2021-08-06 19:30:47,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7630 states and 12836 transitions. [2021-08-06 19:30:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:47,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:47,316 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:47,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 19:30:47,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,517 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 964565170, now seen corresponding path program 71 times [2021-08-06 19:30:47,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:47,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69283581] [2021-08-06 19:30:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,724 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:47,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:47,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:47,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69283581] [2021-08-06 19:30:47,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69283581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918884512] [2021-08-06 19:30:47,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:47,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:47,743 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:47,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 19:30:49,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:30:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:49,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:50,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918884512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:50,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:50,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-06 19:30:50,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731937616] [2021-08-06 19:30:50,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:30:50,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:30:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:30:50,442 INFO L87 Difference]: Start difference. First operand 7630 states and 12836 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:51,050 INFO L93 Difference]: Finished difference Result 7739 states and 12993 transitions. [2021-08-06 19:30:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:30:51,051 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:51,061 INFO L225 Difference]: With dead ends: 7739 [2021-08-06 19:30:51,061 INFO L226 Difference]: Without dead ends: 7727 [2021-08-06 19:30:51,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:30:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7727 states. [2021-08-06 19:30:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7727 to 7681. [2021-08-06 19:30:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7681 states, 7680 states have (on average 1.683203125) internal successors, (12927), 7680 states have internal predecessors, (12927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7681 states to 7681 states and 12927 transitions. [2021-08-06 19:30:51,151 INFO L78 Accepts]: Start accepts. Automaton has 7681 states and 12927 transitions. Word has length 38 [2021-08-06 19:30:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:51,151 INFO L470 AbstractCegarLoop]: Abstraction has 7681 states and 12927 transitions. [2021-08-06 19:30:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7681 states and 12927 transitions. [2021-08-06 19:30:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:51,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:51,158 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:51,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 19:30:51,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-06 19:30:51,373 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1702059864, now seen corresponding path program 72 times [2021-08-06 19:30:51,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:51,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783465770] [2021-08-06 19:30:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:51,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:51,609 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:51,610 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:51,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:51,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783465770] [2021-08-06 19:30:51,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783465770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:51,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39226566] [2021-08-06 19:30:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:51,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:51,629 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:51,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 19:30:53,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:30:53,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:53,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:53,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:54,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39226566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:54,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 19:30:54,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830373445] [2021-08-06 19:30:54,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:30:54,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:30:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:30:54,494 INFO L87 Difference]: Start difference. First operand 7681 states and 12927 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:55,373 INFO L93 Difference]: Finished difference Result 9500 states and 15743 transitions. [2021-08-06 19:30:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:30:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:55,385 INFO L225 Difference]: With dead ends: 9500 [2021-08-06 19:30:55,386 INFO L226 Difference]: Without dead ends: 9472 [2021-08-06 19:30:55,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 19:30:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2021-08-06 19:30:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 8699. [2021-08-06 19:30:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8699 states, 8698 states have (on average 1.6911933777879973) internal successors, (14710), 8698 states have internal predecessors, (14710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8699 states to 8699 states and 14710 transitions. [2021-08-06 19:30:55,486 INFO L78 Accepts]: Start accepts. Automaton has 8699 states and 14710 transitions. Word has length 38 [2021-08-06 19:30:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:55,486 INFO L470 AbstractCegarLoop]: Abstraction has 8699 states and 14710 transitions. [2021-08-06 19:30:55,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8699 states and 14710 transitions. [2021-08-06 19:30:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:55,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:55,491 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:55,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 19:30:55,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:55,691 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:55,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1936057922, now seen corresponding path program 73 times [2021-08-06 19:30:55,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:55,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886497576] [2021-08-06 19:30:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:55,692 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:55,902 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:55,903 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:55,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:55,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886497576] [2021-08-06 19:30:55,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886497576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:55,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204075664] [2021-08-06 19:30:55,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:55,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:55,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:55,922 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:55,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 19:30:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:58,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:30:58,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:58,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204075664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:58,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:30:58,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241595717] [2021-08-06 19:30:58,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:30:58,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:30:58,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:30:58,591 INFO L87 Difference]: Start difference. First operand 8699 states and 14710 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:59,395 INFO L93 Difference]: Finished difference Result 8965 states and 15124 transitions. [2021-08-06 19:30:59,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:30:59,395 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:30:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:59,405 INFO L225 Difference]: With dead ends: 8965 [2021-08-06 19:30:59,405 INFO L226 Difference]: Without dead ends: 8959 [2021-08-06 19:30:59,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 618.1ms TimeCoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:30:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8959 states. [2021-08-06 19:30:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8959 to 8728. [2021-08-06 19:30:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 1.6917612008708605) internal successors, (14764), 8727 states have internal predecessors, (14764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 14764 transitions. [2021-08-06 19:30:59,498 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 14764 transitions. Word has length 38 [2021-08-06 19:30:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:59,498 INFO L470 AbstractCegarLoop]: Abstraction has 8728 states and 14764 transitions. [2021-08-06 19:30:59,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 14764 transitions. [2021-08-06 19:30:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:30:59,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:59,503 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:59,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 19:30:59,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:59,704 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:30:59,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:59,704 INFO L82 PathProgramCache]: Analyzing trace with hash -232089820, now seen corresponding path program 74 times [2021-08-06 19:30:59,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:59,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86984279] [2021-08-06 19:30:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:59,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:59,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:59,950 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:30:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:59,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:59,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86984279] [2021-08-06 19:30:59,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86984279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:59,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724478622] [2021-08-06 19:30:59,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:59,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:59,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:59,973 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:59,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 19:31:02,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:02,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724478622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:02,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:02,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:31:02,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124348100] [2021-08-06 19:31:02,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:31:02,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:02,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:31:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:02,801 INFO L87 Difference]: Start difference. First operand 8728 states and 14764 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:03,371 INFO L93 Difference]: Finished difference Result 8860 states and 14955 transitions. [2021-08-06 19:31:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:31:03,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:03,380 INFO L225 Difference]: With dead ends: 8860 [2021-08-06 19:31:03,380 INFO L226 Difference]: Without dead ends: 8854 [2021-08-06 19:31:03,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:31:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8854 states. [2021-08-06 19:31:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8854 to 8757. [2021-08-06 19:31:03,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8757 states, 8756 states have (on average 1.692439470077661) internal successors, (14819), 8756 states have internal predecessors, (14819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8757 states to 8757 states and 14819 transitions. [2021-08-06 19:31:03,467 INFO L78 Accepts]: Start accepts. Automaton has 8757 states and 14819 transitions. Word has length 38 [2021-08-06 19:31:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:03,467 INFO L470 AbstractCegarLoop]: Abstraction has 8757 states and 14819 transitions. [2021-08-06 19:31:03,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 8757 states and 14819 transitions. [2021-08-06 19:31:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:03,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:03,473 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:03,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 19:31:03,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 19:31:03,674 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:03,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1165747442, now seen corresponding path program 75 times [2021-08-06 19:31:03,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:03,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919769215] [2021-08-06 19:31:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:03,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:03,879 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:03,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:03,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:03,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919769215] [2021-08-06 19:31:03,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919769215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:03,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310479126] [2021-08-06 19:31:03,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:03,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:03,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:03,899 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:03,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 19:31:06,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:31:06,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:06,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310479126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:06,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:06,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:31:06,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808086015] [2021-08-06 19:31:06,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:31:06,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:06,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:31:06,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:31:06,705 INFO L87 Difference]: Start difference. First operand 8757 states and 14819 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:07,696 INFO L93 Difference]: Finished difference Result 9974 states and 16714 transitions. [2021-08-06 19:31:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:31:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:07,708 INFO L225 Difference]: With dead ends: 9974 [2021-08-06 19:31:07,708 INFO L226 Difference]: Without dead ends: 9962 [2021-08-06 19:31:07,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 679.3ms TimeCoverageRelationStatistics Valid=148, Invalid=1492, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 19:31:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9962 states. [2021-08-06 19:31:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9962 to 8892. [2021-08-06 19:31:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8892 states, 8891 states have (on average 1.6927229782926554) internal successors, (15050), 8891 states have internal predecessors, (15050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8892 states to 8892 states and 15050 transitions. [2021-08-06 19:31:07,811 INFO L78 Accepts]: Start accepts. Automaton has 8892 states and 15050 transitions. Word has length 38 [2021-08-06 19:31:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:07,811 INFO L470 AbstractCegarLoop]: Abstraction has 8892 states and 15050 transitions. [2021-08-06 19:31:07,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 8892 states and 15050 transitions. [2021-08-06 19:31:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:07,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:07,817 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:07,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 19:31:08,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:08,017 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:08,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:08,018 INFO L82 PathProgramCache]: Analyzing trace with hash -354220666, now seen corresponding path program 76 times [2021-08-06 19:31:08,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:08,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149258967] [2021-08-06 19:31:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:08,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:08,217 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:08,218 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:08,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:08,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149258967] [2021-08-06 19:31:08,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149258967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:08,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763587525] [2021-08-06 19:31:08,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:08,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:08,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:08,238 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:08,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 19:31:10,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:11,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763587525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:11,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:11,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:31:11,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220475293] [2021-08-06 19:31:11,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:31:11,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:31:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:31:11,166 INFO L87 Difference]: Start difference. First operand 8892 states and 15050 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 19:31:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:11,907 INFO L93 Difference]: Finished difference Result 9666 states and 16272 transitions. [2021-08-06 19:31:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:31:11,908 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:11,918 INFO L225 Difference]: With dead ends: 9666 [2021-08-06 19:31:11,918 INFO L226 Difference]: Without dead ends: 9648 [2021-08-06 19:31:11,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 620.2ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:31:11,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9648 states. [2021-08-06 19:31:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9648 to 9075. [2021-08-06 19:31:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9075 states, 9074 states have (on average 1.6937403570641394) internal successors, (15369), 9074 states have internal predecessors, (15369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9075 states to 9075 states and 15369 transitions. [2021-08-06 19:31:12,011 INFO L78 Accepts]: Start accepts. Automaton has 9075 states and 15369 transitions. Word has length 38 [2021-08-06 19:31:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:12,011 INFO L470 AbstractCegarLoop]: Abstraction has 9075 states and 15369 transitions. [2021-08-06 19:31:12,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 19:31:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9075 states and 15369 transitions. [2021-08-06 19:31:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:12,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:12,016 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:12,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:12,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:12,217 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 604701506, now seen corresponding path program 77 times [2021-08-06 19:31:12,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:12,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624605059] [2021-08-06 19:31:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:12,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:12,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:12,467 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:12,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624605059] [2021-08-06 19:31:12,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624605059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:12,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47716850] [2021-08-06 19:31:12,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:12,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:12,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:12,487 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:12,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 19:31:14,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:31:14,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:14,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:14,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:15,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47716850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:15,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:15,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-06 19:31:15,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468463177] [2021-08-06 19:31:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:31:15,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:31:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:31:15,424 INFO L87 Difference]: Start difference. First operand 9075 states and 15369 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 19:31:16,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:16,182 INFO L93 Difference]: Finished difference Result 9535 states and 16060 transitions. [2021-08-06 19:31:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:31:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 38 [2021-08-06 19:31:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:16,194 INFO L225 Difference]: With dead ends: 9535 [2021-08-06 19:31:16,194 INFO L226 Difference]: Without dead ends: 9523 [2021-08-06 19:31:16,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 657.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:31:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9523 states. [2021-08-06 19:31:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9523 to 9131. [2021-08-06 19:31:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9131 states, 9130 states have (on average 1.6947426067907996) internal successors, (15473), 9130 states have internal predecessors, (15473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 15473 transitions. [2021-08-06 19:31:16,320 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 15473 transitions. Word has length 38 [2021-08-06 19:31:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:16,320 INFO L470 AbstractCegarLoop]: Abstraction has 9131 states and 15473 transitions. [2021-08-06 19:31:16,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 19:31:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 15473 transitions. [2021-08-06 19:31:16,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:16,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:16,325 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:16,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:16,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 19:31:16,526 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:16,526 INFO L82 PathProgramCache]: Analyzing trace with hash -2075745518, now seen corresponding path program 78 times [2021-08-06 19:31:16,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:16,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877122689] [2021-08-06 19:31:16,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:16,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:16,838 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:16,839 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:16,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:16,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877122689] [2021-08-06 19:31:16,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877122689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:16,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388022998] [2021-08-06 19:31:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:16,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:16,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:16,857 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:16,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 19:31:19,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:31:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:19,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388022998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:19,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:19,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:31:19,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306248616] [2021-08-06 19:31:19,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:31:19,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:19,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:31:19,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:19,728 INFO L87 Difference]: Start difference. First operand 9131 states and 15473 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:20,285 INFO L93 Difference]: Finished difference Result 9230 states and 15615 transitions. [2021-08-06 19:31:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:31:20,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:20,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:20,296 INFO L225 Difference]: With dead ends: 9230 [2021-08-06 19:31:20,296 INFO L226 Difference]: Without dead ends: 9224 [2021-08-06 19:31:20,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:31:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9224 states. [2021-08-06 19:31:20,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9224 to 9157. [2021-08-06 19:31:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9157 states, 9156 states have (on average 1.695391000436872) internal successors, (15523), 9156 states have internal predecessors, (15523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9157 states to 9157 states and 15523 transitions. [2021-08-06 19:31:20,392 INFO L78 Accepts]: Start accepts. Automaton has 9157 states and 15523 transitions. Word has length 38 [2021-08-06 19:31:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:20,392 INFO L470 AbstractCegarLoop]: Abstraction has 9157 states and 15523 transitions. [2021-08-06 19:31:20,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 9157 states and 15523 transitions. [2021-08-06 19:31:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:20,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:20,398 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:20,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:20,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:20,598 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:20,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1551755548, now seen corresponding path program 79 times [2021-08-06 19:31:20,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:20,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706136716] [2021-08-06 19:31:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:20,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:20,854 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:20,855 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:20,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:20,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706136716] [2021-08-06 19:31:20,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706136716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:20,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957103381] [2021-08-06 19:31:20,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:20,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:20,873 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:20,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 19:31:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:23,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:23,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957103381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:23,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:23,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:31:23,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932726669] [2021-08-06 19:31:23,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:31:23,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:31:23,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:23,787 INFO L87 Difference]: Start difference. First operand 9157 states and 15523 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:24,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:24,594 INFO L93 Difference]: Finished difference Result 9546 states and 16091 transitions. [2021-08-06 19:31:24,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:31:24,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:24,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:24,606 INFO L225 Difference]: With dead ends: 9546 [2021-08-06 19:31:24,607 INFO L226 Difference]: Without dead ends: 9534 [2021-08-06 19:31:24,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:31:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9534 states. [2021-08-06 19:31:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9534 to 9243. [2021-08-06 19:31:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9243 states, 9242 states have (on average 1.6964942653105388) internal successors, (15679), 9242 states have internal predecessors, (15679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9243 states to 9243 states and 15679 transitions. [2021-08-06 19:31:24,760 INFO L78 Accepts]: Start accepts. Automaton has 9243 states and 15679 transitions. Word has length 38 [2021-08-06 19:31:24,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:24,760 INFO L470 AbstractCegarLoop]: Abstraction has 9243 states and 15679 transitions. [2021-08-06 19:31:24,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 9243 states and 15679 transitions. [2021-08-06 19:31:24,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:24,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:24,766 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:24,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:24,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:24,967 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:24,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1361477390, now seen corresponding path program 80 times [2021-08-06 19:31:24,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:24,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812443072] [2021-08-06 19:31:24,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:24,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:25,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:25,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:25,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:25,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812443072] [2021-08-06 19:31:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812443072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:25,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693482682] [2021-08-06 19:31:25,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:25,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:25,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:25,198 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:25,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 19:31:27,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:27,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:27,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693482682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:28,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-06 19:31:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488138898] [2021-08-06 19:31:28,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:31:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:31:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:31:28,304 INFO L87 Difference]: Start difference. First operand 9243 states and 15679 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:28,985 INFO L93 Difference]: Finished difference Result 9415 states and 15920 transitions. [2021-08-06 19:31:28,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:31:28,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:28,996 INFO L225 Difference]: With dead ends: 9415 [2021-08-06 19:31:28,996 INFO L226 Difference]: Without dead ends: 9403 [2021-08-06 19:31:28,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 602.9ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:31:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9403 states. [2021-08-06 19:31:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9403 to 9288. [2021-08-06 19:31:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9288 states, 9287 states have (on average 1.6974265101755142) internal successors, (15764), 9287 states have internal predecessors, (15764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9288 states to 9288 states and 15764 transitions. [2021-08-06 19:31:29,086 INFO L78 Accepts]: Start accepts. Automaton has 9288 states and 15764 transitions. Word has length 38 [2021-08-06 19:31:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:29,086 INFO L470 AbstractCegarLoop]: Abstraction has 9288 states and 15764 transitions. [2021-08-06 19:31:29,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 9288 states and 15764 transitions. [2021-08-06 19:31:29,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:29,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:29,091 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:29,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:29,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:29,292 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash -623982696, now seen corresponding path program 81 times [2021-08-06 19:31:29,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:29,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985647204] [2021-08-06 19:31:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:29,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:29,501 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:29,502 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:29,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985647204] [2021-08-06 19:31:29,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985647204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:29,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95875834] [2021-08-06 19:31:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:29,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:29,524 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:29,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 19:31:31,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:31:31,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:31,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:31,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:32,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95875834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:32,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:32,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:31:32,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101048438] [2021-08-06 19:31:32,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:31:32,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:32,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:31:32,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:31:32,575 INFO L87 Difference]: Start difference. First operand 9288 states and 15764 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:33,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:33,417 INFO L93 Difference]: Finished difference Result 10294 states and 17358 transitions. [2021-08-06 19:31:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:31:33,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:33,430 INFO L225 Difference]: With dead ends: 10294 [2021-08-06 19:31:33,430 INFO L226 Difference]: Without dead ends: 10280 [2021-08-06 19:31:33,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:31:33,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10280 states. [2021-08-06 19:31:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10280 to 9437. [2021-08-06 19:31:33,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9437 states, 9436 states have (on average 1.698601102161933) internal successors, (16028), 9436 states have internal predecessors, (16028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9437 states to 9437 states and 16028 transitions. [2021-08-06 19:31:33,532 INFO L78 Accepts]: Start accepts. Automaton has 9437 states and 16028 transitions. Word has length 38 [2021-08-06 19:31:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:33,532 INFO L470 AbstractCegarLoop]: Abstraction has 9437 states and 16028 transitions. [2021-08-06 19:31:33,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 9437 states and 16028 transitions. [2021-08-06 19:31:33,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:33,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:33,538 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:33,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 19:31:33,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 19:31:33,738 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash -52519542, now seen corresponding path program 82 times [2021-08-06 19:31:33,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:33,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444181289] [2021-08-06 19:31:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:33,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:33,957 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:33,958 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:33,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:33,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444181289] [2021-08-06 19:31:33,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444181289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:33,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67904139] [2021-08-06 19:31:33,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:33,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:33,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:33,977 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:33,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 19:31:36,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:36,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:37,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67904139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:37,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:37,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:31:37,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244944694] [2021-08-06 19:31:37,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:31:37,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:31:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:37,006 INFO L87 Difference]: Start difference. First operand 9437 states and 16028 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:37,789 INFO L93 Difference]: Finished difference Result 9612 states and 16293 transitions. [2021-08-06 19:31:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:31:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:37,799 INFO L225 Difference]: With dead ends: 9612 [2021-08-06 19:31:37,800 INFO L226 Difference]: Without dead ends: 9600 [2021-08-06 19:31:37,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 608.8ms TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:31:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9600 states. [2021-08-06 19:31:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9600 to 9513. [2021-08-06 19:31:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9513 states, 9512 states have (on average 1.6990117746005047) internal successors, (16161), 9512 states have internal predecessors, (16161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 16161 transitions. [2021-08-06 19:31:37,896 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 16161 transitions. Word has length 38 [2021-08-06 19:31:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:37,896 INFO L470 AbstractCegarLoop]: Abstraction has 9513 states and 16161 transitions. [2021-08-06 19:31:37,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 16161 transitions. [2021-08-06 19:31:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:37,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:37,902 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:37,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:38,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:38,116 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 137758616, now seen corresponding path program 83 times [2021-08-06 19:31:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596161926] [2021-08-06 19:31:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:38,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:38,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:38,324 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:38,341 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:38,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:38,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596161926] [2021-08-06 19:31:38,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596161926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:38,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435215175] [2021-08-06 19:31:38,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:38,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:38,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:38,343 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:38,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 19:31:40,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:31:40,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:40,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:41,498 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:41,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435215175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:41,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:41,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-06 19:31:41,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711713876] [2021-08-06 19:31:41,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:31:41,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:41,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:31:41,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:31:41,499 INFO L87 Difference]: Start difference. First operand 9513 states and 16161 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:42,158 INFO L93 Difference]: Finished difference Result 9617 states and 16311 transitions. [2021-08-06 19:31:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:31:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:42,168 INFO L225 Difference]: With dead ends: 9617 [2021-08-06 19:31:42,168 INFO L226 Difference]: Without dead ends: 9605 [2021-08-06 19:31:42,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:31:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9605 states. [2021-08-06 19:31:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9605 to 9558. [2021-08-06 19:31:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9558 states, 9557 states have (on average 1.6996965574971226) internal successors, (16244), 9557 states have internal predecessors, (16244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 16244 transitions. [2021-08-06 19:31:42,265 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 16244 transitions. Word has length 38 [2021-08-06 19:31:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:42,265 INFO L470 AbstractCegarLoop]: Abstraction has 9558 states and 16244 transitions. [2021-08-06 19:31:42,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,266 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 16244 transitions. [2021-08-06 19:31:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:42,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:42,271 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:42,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 19:31:42,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:42,493 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 759007234, now seen corresponding path program 84 times [2021-08-06 19:31:42,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:42,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46975555] [2021-08-06 19:31:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:42,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:42,740 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:42,741 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:42,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:42,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46975555] [2021-08-06 19:31:42,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46975555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:42,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235273740] [2021-08-06 19:31:42,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:42,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:42,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:42,759 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:42,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 19:31:45,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:31:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:46,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235273740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:46,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:46,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-06 19:31:46,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757259859] [2021-08-06 19:31:46,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:31:46,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:46,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:31:46,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:31:46,054 INFO L87 Difference]: Start difference. First operand 9558 states and 16244 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:47,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:47,286 INFO L93 Difference]: Finished difference Result 10749 states and 18174 transitions. [2021-08-06 19:31:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 19:31:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:47,299 INFO L225 Difference]: With dead ends: 10749 [2021-08-06 19:31:47,299 INFO L226 Difference]: Without dead ends: 10725 [2021-08-06 19:31:47,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 959.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 19:31:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10725 states. [2021-08-06 19:31:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10725 to 9558. [2021-08-06 19:31:47,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9558 states, 9557 states have (on average 1.6996965574971226) internal successors, (16244), 9557 states have internal predecessors, (16244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9558 states to 9558 states and 16244 transitions. [2021-08-06 19:31:47,405 INFO L78 Accepts]: Start accepts. Automaton has 9558 states and 16244 transitions. Word has length 38 [2021-08-06 19:31:47,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:47,405 INFO L470 AbstractCegarLoop]: Abstraction has 9558 states and 16244 transitions. [2021-08-06 19:31:47,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:47,406 INFO L276 IsEmpty]: Start isEmpty. Operand 9558 states and 16244 transitions. [2021-08-06 19:31:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:47,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:47,411 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:47,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:47,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:47,611 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:47,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1532102820, now seen corresponding path program 85 times [2021-08-06 19:31:47,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:47,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188961620] [2021-08-06 19:31:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:47,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:47,823 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:47,824 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:47,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:47,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188961620] [2021-08-06 19:31:47,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188961620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:47,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50384825] [2021-08-06 19:31:47,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:47,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:47,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:47,843 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:47,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 19:31:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:50,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:51,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50384825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:51,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:51,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:31:51,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797532928] [2021-08-06 19:31:51,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:31:51,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:51,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:31:51,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:51,046 INFO L87 Difference]: Start difference. First operand 9558 states and 16244 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:51,646 INFO L93 Difference]: Finished difference Result 9638 states and 16361 transitions. [2021-08-06 19:31:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:31:51,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:51,658 INFO L225 Difference]: With dead ends: 9638 [2021-08-06 19:31:51,658 INFO L226 Difference]: Without dead ends: 9632 [2021-08-06 19:31:51,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:31:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2021-08-06 19:31:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 9584. [2021-08-06 19:31:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9584 states, 9583 states have (on average 1.7003026192215382) internal successors, (16294), 9583 states have internal predecessors, (16294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 16294 transitions. [2021-08-06 19:31:51,758 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 16294 transitions. Word has length 38 [2021-08-06 19:31:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:51,759 INFO L470 AbstractCegarLoop]: Abstraction has 9584 states and 16294 transitions. [2021-08-06 19:31:51,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 16294 transitions. [2021-08-06 19:31:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:51,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:51,764 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:51,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:51,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:51,965 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1884087528, now seen corresponding path program 86 times [2021-08-06 19:31:51,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:51,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682102715] [2021-08-06 19:31:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:51,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:52,174 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:52,175 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:52,193 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:52,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:52,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682102715] [2021-08-06 19:31:52,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682102715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:52,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668637518] [2021-08-06 19:31:52,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:52,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:52,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:52,194 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:52,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 19:31:54,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:54,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:55,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668637518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:55,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:55,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:31:55,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176325151] [2021-08-06 19:31:55,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:31:55,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:31:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:31:55,493 INFO L87 Difference]: Start difference. First operand 9584 states and 16294 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:56,064 INFO L93 Difference]: Finished difference Result 9792 states and 16621 transitions. [2021-08-06 19:31:56,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:31:56,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:31:56,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:56,078 INFO L225 Difference]: With dead ends: 9792 [2021-08-06 19:31:56,078 INFO L226 Difference]: Without dead ends: 9780 [2021-08-06 19:31:56,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:31:56,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9780 states. [2021-08-06 19:31:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9780 to 9705. [2021-08-06 19:31:56,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9705 states, 9704 states have (on average 1.7012572135201978) internal successors, (16509), 9704 states have internal predecessors, (16509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9705 states to 9705 states and 16509 transitions. [2021-08-06 19:31:56,185 INFO L78 Accepts]: Start accepts. Automaton has 9705 states and 16509 transitions. Word has length 38 [2021-08-06 19:31:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:56,185 INFO L470 AbstractCegarLoop]: Abstraction has 9705 states and 16509 transitions. [2021-08-06 19:31:56,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9705 states and 16509 transitions. [2021-08-06 19:31:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:31:56,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:56,191 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:56,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 19:31:56,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 19:31:56,392 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:31:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1280587154, now seen corresponding path program 87 times [2021-08-06 19:31:56,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:56,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376878559] [2021-08-06 19:31:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:56,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:56,604 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:56,605 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:31:56,623 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:56,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:56,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376878559] [2021-08-06 19:31:56,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376878559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:56,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081365511] [2021-08-06 19:31:56,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:56,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:56,624 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:56,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 19:31:59,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:31:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:31:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:59,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081365511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:59,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:59,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:31:59,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670318798] [2021-08-06 19:31:59,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:31:59,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:31:59,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:31:59,922 INFO L87 Difference]: Start difference. First operand 9705 states and 16509 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:01,136 INFO L93 Difference]: Finished difference Result 10383 states and 17541 transitions. [2021-08-06 19:32:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:32:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:01,147 INFO L225 Difference]: With dead ends: 10383 [2021-08-06 19:32:01,147 INFO L226 Difference]: Without dead ends: 10371 [2021-08-06 19:32:01,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 715.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:32:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10371 states. [2021-08-06 19:32:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10371 to 9763. [2021-08-06 19:32:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9763 states, 9762 states have (on average 1.7022126613398894) internal successors, (16617), 9762 states have internal predecessors, (16617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9763 states to 9763 states and 16617 transitions. [2021-08-06 19:32:01,250 INFO L78 Accepts]: Start accepts. Automaton has 9763 states and 16617 transitions. Word has length 38 [2021-08-06 19:32:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:01,250 INFO L470 AbstractCegarLoop]: Abstraction has 9763 states and 16617 transitions. [2021-08-06 19:32:01,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9763 states and 16617 transitions. [2021-08-06 19:32:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:01,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:01,256 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:01,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 19:32:01,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 19:32:01,457 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:01,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:01,457 INFO L82 PathProgramCache]: Analyzing trace with hash -659338536, now seen corresponding path program 88 times [2021-08-06 19:32:01,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:01,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349063858] [2021-08-06 19:32:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:01,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:01,702 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:01,703 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:01,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:01,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349063858] [2021-08-06 19:32:01,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349063858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:01,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995478745] [2021-08-06 19:32:01,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:01,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:01,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:01,723 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:01,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 19:32:04,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:04,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:04,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:05,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995478745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:05,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:05,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:32:05,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94098599] [2021-08-06 19:32:05,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:32:05,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:05,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:32:05,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:05,104 INFO L87 Difference]: Start difference. First operand 9763 states and 16617 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 19:32:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:05,808 INFO L93 Difference]: Finished difference Result 10499 states and 17774 transitions. [2021-08-06 19:32:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:05,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:05,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:05,822 INFO L225 Difference]: With dead ends: 10499 [2021-08-06 19:32:05,822 INFO L226 Difference]: Without dead ends: 10481 [2021-08-06 19:32:05,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:32:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10481 states. [2021-08-06 19:32:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10481 to 9765. [2021-08-06 19:32:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 1.702376075378943) internal successors, (16622), 9764 states have internal predecessors, (16622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 16622 transitions. [2021-08-06 19:32:05,932 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 16622 transitions. Word has length 38 [2021-08-06 19:32:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:05,932 INFO L470 AbstractCegarLoop]: Abstraction has 9765 states and 16622 transitions. [2021-08-06 19:32:05,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 19:32:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 16622 transitions. [2021-08-06 19:32:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:05,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:05,937 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:05,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 19:32:06,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:06,138 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1914103908, now seen corresponding path program 89 times [2021-08-06 19:32:06,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:06,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319724773] [2021-08-06 19:32:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:06,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:06,351 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:06,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:06,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:06,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319724773] [2021-08-06 19:32:06,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319724773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:06,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514380406] [2021-08-06 19:32:06,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:06,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:06,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:06,374 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:06,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 19:32:09,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:32:09,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:09,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:09,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514380406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:09,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:09,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:32:09,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420757516] [2021-08-06 19:32:09,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:32:09,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:09,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:32:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:09,763 INFO L87 Difference]: Start difference. First operand 9765 states and 16622 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:10,311 INFO L93 Difference]: Finished difference Result 9842 states and 16735 transitions. [2021-08-06 19:32:10,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:10,322 INFO L225 Difference]: With dead ends: 9842 [2021-08-06 19:32:10,322 INFO L226 Difference]: Without dead ends: 9836 [2021-08-06 19:32:10,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 521.7ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:32:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-08-06 19:32:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 9791. [2021-08-06 19:32:10,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9791 states, 9790 states have (on average 1.7029622063329928) internal successors, (16672), 9790 states have internal predecessors, (16672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9791 states to 9791 states and 16672 transitions. [2021-08-06 19:32:10,461 INFO L78 Accepts]: Start accepts. Automaton has 9791 states and 16672 transitions. Word has length 38 [2021-08-06 19:32:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:10,461 INFO L470 AbstractCegarLoop]: Abstraction has 9791 states and 16672 transitions. [2021-08-06 19:32:10,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 9791 states and 16672 transitions. [2021-08-06 19:32:10,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:10,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:10,482 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:10,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:10,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:10,693 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:10,693 INFO L82 PathProgramCache]: Analyzing trace with hash 142853822, now seen corresponding path program 90 times [2021-08-06 19:32:10,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:10,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574543564] [2021-08-06 19:32:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:10,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:10,899 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:10,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:10,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:10,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574543564] [2021-08-06 19:32:10,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574543564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:10,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027188424] [2021-08-06 19:32:10,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:10,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:10,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:10,919 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:10,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 19:32:13,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:32:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:13,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:13,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:14,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027188424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:14,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:14,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:32:14,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013359946] [2021-08-06 19:32:14,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:32:14,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:14,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:32:14,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:14,298 INFO L87 Difference]: Start difference. First operand 9791 states and 16672 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:14,834 INFO L93 Difference]: Finished difference Result 9884 states and 16807 transitions. [2021-08-06 19:32:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:14,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:14,849 INFO L225 Difference]: With dead ends: 9884 [2021-08-06 19:32:14,849 INFO L226 Difference]: Without dead ends: 9878 [2021-08-06 19:32:14,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 487.7ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:32:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2021-08-06 19:32:14,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 9818. [2021-08-06 19:32:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9818 states, 9817 states have (on average 1.7036772944891514) internal successors, (16725), 9817 states have internal predecessors, (16725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9818 states to 9818 states and 16725 transitions. [2021-08-06 19:32:14,961 INFO L78 Accepts]: Start accepts. Automaton has 9818 states and 16725 transitions. Word has length 38 [2021-08-06 19:32:14,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:14,961 INFO L470 AbstractCegarLoop]: Abstraction has 9818 states and 16725 transitions. [2021-08-06 19:32:14,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:14,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9818 states and 16725 transitions. [2021-08-06 19:32:14,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:14,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:14,968 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:14,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:15,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 19:32:15,169 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:15,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:15,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1204026016, now seen corresponding path program 91 times [2021-08-06 19:32:15,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:15,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602494483] [2021-08-06 19:32:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:15,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:15,386 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:15,387 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:15,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:15,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602494483] [2021-08-06 19:32:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602494483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:15,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302817027] [2021-08-06 19:32:15,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:15,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:15,405 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:15,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 19:32:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:18,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:18,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302817027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:18,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:32:18,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718298543] [2021-08-06 19:32:18,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:32:18,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:32:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:18,831 INFO L87 Difference]: Start difference. First operand 9818 states and 16725 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:19,369 INFO L93 Difference]: Finished difference Result 10028 states and 17061 transitions. [2021-08-06 19:32:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:19,381 INFO L225 Difference]: With dead ends: 10028 [2021-08-06 19:32:19,382 INFO L226 Difference]: Without dead ends: 10016 [2021-08-06 19:32:19,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:32:19,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-08-06 19:32:19,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 9952. [2021-08-06 19:32:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 9951 states have (on average 1.7048537835393427) internal successors, (16965), 9951 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 16965 transitions. [2021-08-06 19:32:19,528 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 16965 transitions. Word has length 38 [2021-08-06 19:32:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:19,528 INFO L470 AbstractCegarLoop]: Abstraction has 9952 states and 16965 transitions. [2021-08-06 19:32:19,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 16965 transitions. [2021-08-06 19:32:19,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:19,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:19,535 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:19,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 19:32:19,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,735 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash 20722976, now seen corresponding path program 92 times [2021-08-06 19:32:19,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:19,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945006571] [2021-08-06 19:32:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:19,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:20,008 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:20,009 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:20,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:20,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945006571] [2021-08-06 19:32:20,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945006571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:20,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299616605] [2021-08-06 19:32:20,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:20,027 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:20,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:20,028 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:20,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 19:32:22,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:22,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:23,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299616605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:23,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:23,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:32:23,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19154815] [2021-08-06 19:32:23,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:32:23,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:32:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:23,543 INFO L87 Difference]: Start difference. First operand 9952 states and 16965 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 19:32:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:24,155 INFO L93 Difference]: Finished difference Result 10683 states and 18110 transitions. [2021-08-06 19:32:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:32:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:24,169 INFO L225 Difference]: With dead ends: 10683 [2021-08-06 19:32:24,170 INFO L226 Difference]: Without dead ends: 10665 [2021-08-06 19:32:24,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:32:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10665 states. [2021-08-06 19:32:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10665 to 10134. [2021-08-06 19:32:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10134 states, 10133 states have (on average 1.7062074410342445) internal successors, (17289), 10133 states have internal predecessors, (17289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:24,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10134 states to 10134 states and 17289 transitions. [2021-08-06 19:32:24,318 INFO L78 Accepts]: Start accepts. Automaton has 10134 states and 17289 transitions. Word has length 38 [2021-08-06 19:32:24,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:24,318 INFO L470 AbstractCegarLoop]: Abstraction has 10134 states and 17289 transitions. [2021-08-06 19:32:24,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 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 19:32:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 10134 states and 17289 transitions. [2021-08-06 19:32:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:24,324 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:24,324 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:24,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 19:32:24,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 19:32:24,525 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1602499108, now seen corresponding path program 93 times [2021-08-06 19:32:24,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:24,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617078901] [2021-08-06 19:32:24,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:24,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:24,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:24,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:24,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:24,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617078901] [2021-08-06 19:32:24,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617078901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:24,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764899176] [2021-08-06 19:32:24,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:24,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:24,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:24,757 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:24,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 19:32:27,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:28,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764899176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:28,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:28,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-06 19:32:28,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775171868] [2021-08-06 19:32:28,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:32:28,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:32:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:32:28,357 INFO L87 Difference]: Start difference. First operand 10134 states and 17289 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:29,396 INFO L93 Difference]: Finished difference Result 10747 states and 18227 transitions. [2021-08-06 19:32:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:32:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:29,407 INFO L225 Difference]: With dead ends: 10747 [2021-08-06 19:32:29,407 INFO L226 Difference]: Without dead ends: 10735 [2021-08-06 19:32:29,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 700.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:32:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10735 states. [2021-08-06 19:32:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10735 to 10114. [2021-08-06 19:32:29,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10114 states, 10113 states have (on average 1.7058241866903985) internal successors, (17251), 10113 states have internal predecessors, (17251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10114 states to 10114 states and 17251 transitions. [2021-08-06 19:32:29,513 INFO L78 Accepts]: Start accepts. Automaton has 10114 states and 17251 transitions. Word has length 38 [2021-08-06 19:32:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:29,513 INFO L470 AbstractCegarLoop]: Abstraction has 10114 states and 17251 transitions. [2021-08-06 19:32:29,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 10114 states and 17251 transitions. [2021-08-06 19:32:29,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:29,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:29,519 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:29,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 19:32:29,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 19:32:29,721 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1700801876, now seen corresponding path program 94 times [2021-08-06 19:32:29,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:29,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893229184] [2021-08-06 19:32:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:29,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:29,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:29,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:29,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:29,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893229184] [2021-08-06 19:32:29,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893229184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:29,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203435533] [2021-08-06 19:32:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:29,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:29,951 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:29,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 19:32:32,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:32,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:32,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:33,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203435533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:33,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:33,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:32:33,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907012000] [2021-08-06 19:32:33,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:32:33,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:32:33,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:33,481 INFO L87 Difference]: Start difference. First operand 10114 states and 17251 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:33,996 INFO L93 Difference]: Finished difference Result 10187 states and 17356 transitions. [2021-08-06 19:32:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:33,996 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:34,009 INFO L225 Difference]: With dead ends: 10187 [2021-08-06 19:32:34,009 INFO L226 Difference]: Without dead ends: 10181 [2021-08-06 19:32:34,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:32:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10181 states. [2021-08-06 19:32:34,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10181 to 10140. [2021-08-06 19:32:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10140 states, 10139 states have (on average 1.7063812999309595) internal successors, (17301), 10139 states have internal predecessors, (17301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10140 states to 10140 states and 17301 transitions. [2021-08-06 19:32:34,140 INFO L78 Accepts]: Start accepts. Automaton has 10140 states and 17301 transitions. Word has length 38 [2021-08-06 19:32:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:34,140 INFO L470 AbstractCegarLoop]: Abstraction has 10140 states and 17301 transitions. [2021-08-06 19:32:34,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 10140 states and 17301 transitions. [2021-08-06 19:32:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-06 19:32:34,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:34,148 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:34,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 19:32:34,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 19:32:34,361 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1642089828, now seen corresponding path program 95 times [2021-08-06 19:32:34,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:34,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075471705] [2021-08-06 19:32:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:34,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:34,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:34,576 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:32:34,594 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:34,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:34,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075471705] [2021-08-06 19:32:34,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075471705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:34,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131848102] [2021-08-06 19:32:34,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:34,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:34,596 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:34,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 19:32:37,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:32:37,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:37,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 19:32:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:38,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131848102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:38,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:38,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-06 19:32:38,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972929595] [2021-08-06 19:32:38,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:32:38,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:38,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:32:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:32:38,172 INFO L87 Difference]: Start difference. First operand 10140 states and 17301 transitions. Second operand has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:38,655 INFO L93 Difference]: Finished difference Result 10218 states and 17416 transitions. [2021-08-06 19:32:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:32:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-06 19:32:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:38,669 INFO L225 Difference]: With dead ends: 10218 [2021-08-06 19:32:38,669 INFO L226 Difference]: Without dead ends: 10212 [2021-08-06 19:32:38,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:32:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10212 states. [2021-08-06 19:32:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10212 to 10166. [2021-08-06 19:32:38,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 10165 states have (on average 1.706935563207083) internal successors, (17351), 10165 states have internal predecessors, (17351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 17351 transitions. [2021-08-06 19:32:38,785 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 17351 transitions. Word has length 38 [2021-08-06 19:32:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:38,786 INFO L470 AbstractCegarLoop]: Abstraction has 10166 states and 17351 transitions. [2021-08-06 19:32:38,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 17351 transitions. [2021-08-06 19:32:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:32:38,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:38,792 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:38,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 19:32:38,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:38,993 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash -622705084, now seen corresponding path program 96 times [2021-08-06 19:32:38,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:38,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456395798] [2021-08-06 19:32:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:38,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:39,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:39,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456395798] [2021-08-06 19:32:39,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456395798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:39,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543302014] [2021-08-06 19:32:39,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:39,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:39,047 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:39,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 19:32:42,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:32:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:32:42,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:42,313 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:42,313 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:42,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543302014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:42,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:42,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:32:42,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597677804] [2021-08-06 19:32:42,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:32:42,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:42,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:32:42,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:32:42,333 INFO L87 Difference]: Start difference. First operand 10166 states and 17351 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 19:32:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:42,451 INFO L93 Difference]: Finished difference Result 10837 states and 18244 transitions. [2021-08-06 19:32:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:32:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 39 [2021-08-06 19:32:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:42,464 INFO L225 Difference]: With dead ends: 10837 [2021-08-06 19:32:42,464 INFO L226 Difference]: Without dead ends: 10827 [2021-08-06 19:32:42,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:42,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10827 states. [2021-08-06 19:32:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10827 to 10309. [2021-08-06 19:32:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 10308 states have (on average 1.7029491656965463) internal successors, (17554), 10308 states have internal predecessors, (17554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 17554 transitions. [2021-08-06 19:32:42,580 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 17554 transitions. Word has length 39 [2021-08-06 19:32:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:42,580 INFO L470 AbstractCegarLoop]: Abstraction has 10309 states and 17554 transitions. [2021-08-06 19:32:42,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 19:32:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 17554 transitions. [2021-08-06 19:32:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:32:42,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:42,587 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:42,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 19:32:42,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:42,788 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1311270660, now seen corresponding path program 97 times [2021-08-06 19:32:42,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:42,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618290761] [2021-08-06 19:32:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:42,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:42,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:42,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618290761] [2021-08-06 19:32:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618290761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:42,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799793688] [2021-08-06 19:32:42,847 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:42,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:42,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:42,848 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:42,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 19:32:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:45,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:32:45,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:46,147 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:46,148 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 19:32:46,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799793688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:46,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:46,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:32:46,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543098618] [2021-08-06 19:32:46,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:32:46,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:46,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:32:46,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:32:46,167 INFO L87 Difference]: Start difference. First operand 10309 states and 17554 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 19:32:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:46,246 INFO L93 Difference]: Finished difference Result 12892 states and 21871 transitions. [2021-08-06 19:32:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:32:46,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 39 [2021-08-06 19:32:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:46,286 INFO L225 Difference]: With dead ends: 12892 [2021-08-06 19:32:46,286 INFO L226 Difference]: Without dead ends: 12890 [2021-08-06 19:32:46,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:32:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-08-06 19:32:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 11152. [2021-08-06 19:32:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11152 states, 11151 states have (on average 1.707559860102233) internal successors, (19041), 11151 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:46,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11152 states to 11152 states and 19041 transitions. [2021-08-06 19:32:46,413 INFO L78 Accepts]: Start accepts. Automaton has 11152 states and 19041 transitions. Word has length 39 [2021-08-06 19:32:46,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:46,414 INFO L470 AbstractCegarLoop]: Abstraction has 11152 states and 19041 transitions. [2021-08-06 19:32:46,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 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 19:32:46,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11152 states and 19041 transitions. [2021-08-06 19:32:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:32:46,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:46,421 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:46,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:46,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 19:32:46,623 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash -517176690, now seen corresponding path program 98 times [2021-08-06 19:32:46,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:46,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678758372] [2021-08-06 19:32:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:46,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:46,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:46,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678758372] [2021-08-06 19:32:46,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678758372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:46,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871331386] [2021-08-06 19:32:46,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:46,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:46,691 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:46,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 19:32:49,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:49,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:32:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:50,004 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:50,005 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:50,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871331386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:50,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:50,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 7 [2021-08-06 19:32:50,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485592198] [2021-08-06 19:32:50,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:32:50,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:50,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:32:50,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:32:50,024 INFO L87 Difference]: Start difference. First operand 11152 states and 19041 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:50,120 INFO L93 Difference]: Finished difference Result 12417 states and 20790 transitions. [2021-08-06 19:32:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:32:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 39 [2021-08-06 19:32:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:50,135 INFO L225 Difference]: With dead ends: 12417 [2021-08-06 19:32:50,135 INFO L226 Difference]: Without dead ends: 12417 [2021-08-06 19:32:50,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:32:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12417 states. [2021-08-06 19:32:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12417 to 11670. [2021-08-06 19:32:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11670 states, 11669 states have (on average 1.7063158796812066) internal successors, (19911), 11669 states have internal predecessors, (19911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11670 states to 11670 states and 19911 transitions. [2021-08-06 19:32:50,282 INFO L78 Accepts]: Start accepts. Automaton has 11670 states and 19911 transitions. Word has length 39 [2021-08-06 19:32:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:50,282 INFO L470 AbstractCegarLoop]: Abstraction has 11670 states and 19911 transitions. [2021-08-06 19:32:50,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 11670 states and 19911 transitions. [2021-08-06 19:32:50,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-06 19:32:50,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:50,290 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:50,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:50,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:50,490 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:50,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1785341884, now seen corresponding path program 99 times [2021-08-06 19:32:50,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:50,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427293797] [2021-08-06 19:32:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:50,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:50,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:50,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427293797] [2021-08-06 19:32:50,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427293797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:50,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070564283] [2021-08-06 19:32:50,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:50,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:50,556 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:50,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 19:32:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:32:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:32:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:53,827 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:53,827 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:32:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:32:53,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070564283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:53,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:53,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-08-06 19:32:53,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867628583] [2021-08-06 19:32:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:32:53,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:32:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:32:53,846 INFO L87 Difference]: Start difference. First operand 11670 states and 19911 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:53,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:53,993 INFO L93 Difference]: Finished difference Result 12461 states and 20818 transitions. [2021-08-06 19:32:53,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:32:53,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 39 [2021-08-06 19:32:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:54,009 INFO L225 Difference]: With dead ends: 12461 [2021-08-06 19:32:54,009 INFO L226 Difference]: Without dead ends: 12459 [2021-08-06 19:32:54,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:32:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12459 states. [2021-08-06 19:32:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12459 to 11400. [2021-08-06 19:32:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11400 states, 11399 states have (on average 1.6946223352925696) internal successors, (19317), 11399 states have internal predecessors, (19317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11400 states to 11400 states and 19317 transitions. [2021-08-06 19:32:54,140 INFO L78 Accepts]: Start accepts. Automaton has 11400 states and 19317 transitions. Word has length 39 [2021-08-06 19:32:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:54,140 INFO L470 AbstractCegarLoop]: Abstraction has 11400 states and 19317 transitions. [2021-08-06 19:32:54,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11400 states and 19317 transitions. [2021-08-06 19:32:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 19:32:54,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:54,148 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:54,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:54,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:54,348 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:54,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1374418380, now seen corresponding path program 8 times [2021-08-06 19:32:54,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:54,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734476106] [2021-08-06 19:32:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:54,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:54,475 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:32:54,478 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 71.8 percent of original size [2021-08-06 19:32:54,500 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 19:32:54,504 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 73.8 percent of original size [2021-08-06 19:32:54,529 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 19:32:54,530 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 51.5 percent of original size [2021-08-06 19:32:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-06 19:32:54,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:54,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734476106] [2021-08-06 19:32:54,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734476106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:54,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305195090] [2021-08-06 19:32:54,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:54,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:54,541 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:54,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 19:32:57,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:57,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 19:32:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-06 19:32:58,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305195090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:58,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:58,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:32:58,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613176464] [2021-08-06 19:32:58,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:58,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:58,080 INFO L87 Difference]: Start difference. First operand 11400 states and 19317 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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 19:32:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:58,448 INFO L93 Difference]: Finished difference Result 11499 states and 19457 transitions. [2021-08-06 19:32:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:32:58,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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 40 [2021-08-06 19:32:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:58,462 INFO L225 Difference]: With dead ends: 11499 [2021-08-06 19:32:58,462 INFO L226 Difference]: Without dead ends: 11416 [2021-08-06 19:32:58,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:32:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2021-08-06 19:32:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 11409. [2021-08-06 19:32:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 1.6943373071528751) internal successors, (19329), 11408 states have internal predecessors, (19329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 19329 transitions. [2021-08-06 19:32:58,614 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 19329 transitions. Word has length 40 [2021-08-06 19:32:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:58,614 INFO L470 AbstractCegarLoop]: Abstraction has 11409 states and 19329 transitions. [2021-08-06 19:32:58,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 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 19:32:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 19329 transitions. [2021-08-06 19:32:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:32:58,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:58,622 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:58,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 19:32:58,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:58,822 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:32:58,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:58,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1225041440, now seen corresponding path program 100 times [2021-08-06 19:32:58,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:58,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52732111] [2021-08-06 19:32:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:58,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:32:58,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:58,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52732111] [2021-08-06 19:32:58,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52732111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:58,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31012508] [2021-08-06 19:32:58,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:58,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:58,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:58,907 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:58,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 19:33:02,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:33:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:33:02,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31012508] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:02,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:02,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 19:33:02,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556125820] [2021-08-06 19:33:02,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:33:02,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:02,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:33:02,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:33:02,321 INFO L87 Difference]: Start difference. First operand 11409 states and 19329 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:02,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:02,530 INFO L93 Difference]: Finished difference Result 12657 states and 20989 transitions. [2021-08-06 19:33:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:33:02,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:33:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:02,551 INFO L225 Difference]: With dead ends: 12657 [2021-08-06 19:33:02,551 INFO L226 Difference]: Without dead ends: 12657 [2021-08-06 19:33:02,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 169.1ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:33:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12657 states. [2021-08-06 19:33:02,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12657 to 9765. [2021-08-06 19:33:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9765 states, 9764 states have (on average 1.6526013928717738) internal successors, (16136), 9764 states have internal predecessors, (16136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9765 states to 9765 states and 16136 transitions. [2021-08-06 19:33:02,684 INFO L78 Accepts]: Start accepts. Automaton has 9765 states and 16136 transitions. Word has length 41 [2021-08-06 19:33:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 9765 states and 16136 transitions. [2021-08-06 19:33:02,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9765 states and 16136 transitions. [2021-08-06 19:33:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 19:33:02,691 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:02,691 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:02,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 19:33:02,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 19:33:02,892 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:02,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1009055464, now seen corresponding path program 101 times [2021-08-06 19:33:02,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:02,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29884107] [2021-08-06 19:33:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:02,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:33:02,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:02,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29884107] [2021-08-06 19:33:02,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29884107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:02,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360401704] [2021-08-06 19:33:02,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:02,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:02,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:02,972 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:02,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 19:33:06,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:33:06,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:06,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:33:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:33:06,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360401704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:06,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:06,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 19:33:06,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651833108] [2021-08-06 19:33:06,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:33:06,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:33:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:33:06,509 INFO L87 Difference]: Start difference. First operand 9765 states and 16136 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:06,786 INFO L93 Difference]: Finished difference Result 10278 states and 16497 transitions. [2021-08-06 19:33:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:33:06,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-06 19:33:06,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:06,799 INFO L225 Difference]: With dead ends: 10278 [2021-08-06 19:33:06,799 INFO L226 Difference]: Without dead ends: 10278 [2021-08-06 19:33:06,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-08-06 19:33:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 9543. [2021-08-06 19:33:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9543 states, 9542 states have (on average 1.6136030182351708) internal successors, (15397), 9542 states have internal predecessors, (15397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9543 states to 9543 states and 15397 transitions. [2021-08-06 19:33:06,903 INFO L78 Accepts]: Start accepts. Automaton has 9543 states and 15397 transitions. Word has length 41 [2021-08-06 19:33:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:06,903 INFO L470 AbstractCegarLoop]: Abstraction has 9543 states and 15397 transitions. [2021-08-06 19:33:06,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 9543 states and 15397 transitions. [2021-08-06 19:33:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:06,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:06,911 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:06,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 19:33:07,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 19:33:07,112 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash 713098411, now seen corresponding path program 102 times [2021-08-06 19:33:07,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:07,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070855780] [2021-08-06 19:33:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:07,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:07,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:07,291 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:07,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:07,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070855780] [2021-08-06 19:33:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070855780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:07,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943406790] [2021-08-06 19:33:07,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:07,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:07,308 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:07,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 19:33:10,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:33:10,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:10,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:11,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943406790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:11,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:11,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 19:33:11,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486804195] [2021-08-06 19:33:11,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:33:11,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:33:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:33:11,194 INFO L87 Difference]: Start difference. First operand 9543 states and 15397 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:11,609 INFO L93 Difference]: Finished difference Result 10550 states and 16880 transitions. [2021-08-06 19:33:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:33:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:33:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:11,624 INFO L225 Difference]: With dead ends: 10550 [2021-08-06 19:33:11,624 INFO L226 Difference]: Without dead ends: 10528 [2021-08-06 19:33:11,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 433.1ms TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:33:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10528 states. [2021-08-06 19:33:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10528 to 10219. [2021-08-06 19:33:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10219 states, 10218 states have (on average 1.6105891563906831) internal successors, (16457), 10218 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:11,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10219 states to 10219 states and 16457 transitions. [2021-08-06 19:33:11,746 INFO L78 Accepts]: Start accepts. Automaton has 10219 states and 16457 transitions. Word has length 42 [2021-08-06 19:33:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:11,746 INFO L470 AbstractCegarLoop]: Abstraction has 10219 states and 16457 transitions. [2021-08-06 19:33:11,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 10219 states and 16457 transitions. [2021-08-06 19:33:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:11,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:11,754 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:11,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:11,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 19:33:11,955 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash -701402441, now seen corresponding path program 103 times [2021-08-06 19:33:11,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:11,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617397633] [2021-08-06 19:33:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:11,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:12,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:12,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:12,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:12,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617397633] [2021-08-06 19:33:12,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617397633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:12,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148259130] [2021-08-06 19:33:12,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:12,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:12,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:12,150 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:12,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 19:33:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:15,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148259130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:16,031 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-06 19:33:16,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123908337] [2021-08-06 19:33:16,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:33:16,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:33:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:33:16,032 INFO L87 Difference]: Start difference. First operand 10219 states and 16457 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:16,444 INFO L93 Difference]: Finished difference Result 11676 states and 18639 transitions. [2021-08-06 19:33:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:33:16,444 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:33:16,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:16,457 INFO L225 Difference]: With dead ends: 11676 [2021-08-06 19:33:16,457 INFO L226 Difference]: Without dead ends: 11648 [2021-08-06 19:33:16,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:33:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11648 states. [2021-08-06 19:33:16,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11648 to 10737. [2021-08-06 19:33:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10737 states, 10736 states have (on average 1.60897913561848) internal successors, (17274), 10736 states have internal predecessors, (17274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10737 states to 10737 states and 17274 transitions. [2021-08-06 19:33:16,576 INFO L78 Accepts]: Start accepts. Automaton has 10737 states and 17274 transitions. Word has length 42 [2021-08-06 19:33:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:16,576 INFO L470 AbstractCegarLoop]: Abstraction has 10737 states and 17274 transitions. [2021-08-06 19:33:16,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10737 states and 17274 transitions. [2021-08-06 19:33:16,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:16,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:16,583 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:16,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:16,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 19:33:16,784 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:16,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1146576683, now seen corresponding path program 104 times [2021-08-06 19:33:16,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:16,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207206400] [2021-08-06 19:33:16,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:16,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:16,967 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:16,968 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:16,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:16,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207206400] [2021-08-06 19:33:16,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207206400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:16,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079493942] [2021-08-06 19:33:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:16,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:16,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:16,986 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:16,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 19:33:20,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:20,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:20,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079493942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:20,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:20,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-06 19:33:20,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204403533] [2021-08-06 19:33:20,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:33:20,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:33:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:33:20,872 INFO L87 Difference]: Start difference. First operand 10737 states and 17274 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 19:33:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:21,334 INFO L93 Difference]: Finished difference Result 11562 states and 18468 transitions. [2021-08-06 19:33:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:33:21,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 42 [2021-08-06 19:33:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:21,354 INFO L225 Difference]: With dead ends: 11562 [2021-08-06 19:33:21,354 INFO L226 Difference]: Without dead ends: 11550 [2021-08-06 19:33:21,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:33:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-08-06 19:33:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11185. [2021-08-06 19:33:21,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11185 states, 11184 states have (on average 1.6073855507868384) internal successors, (17977), 11184 states have internal predecessors, (17977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11185 states to 11185 states and 17977 transitions. [2021-08-06 19:33:21,487 INFO L78 Accepts]: Start accepts. Automaton has 11185 states and 17977 transitions. Word has length 42 [2021-08-06 19:33:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:21,487 INFO L470 AbstractCegarLoop]: Abstraction has 11185 states and 17977 transitions. [2021-08-06 19:33:21,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 19:33:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 11185 states and 17977 transitions. [2021-08-06 19:33:21,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:21,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:21,496 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:21,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:21,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:21,697 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 972572727, now seen corresponding path program 105 times [2021-08-06 19:33:21,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:21,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465361678] [2021-08-06 19:33:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:21,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:22,032 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:22,033 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:22,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:22,060 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:22,085 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:22,086 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:22,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:22,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465361678] [2021-08-06 19:33:22,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465361678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:22,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119979471] [2021-08-06 19:33:22,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:22,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:22,109 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:22,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 19:33:25,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:33:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:25,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:26,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119979471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:26,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:26,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:33:26,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069907217] [2021-08-06 19:33:26,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:33:26,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:26,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:33:26,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:26,025 INFO L87 Difference]: Start difference. First operand 11185 states and 17977 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:27,589 INFO L93 Difference]: Finished difference Result 11655 states and 18647 transitions. [2021-08-06 19:33:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:33:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:33:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:27,604 INFO L225 Difference]: With dead ends: 11655 [2021-08-06 19:33:27,604 INFO L226 Difference]: Without dead ends: 11651 [2021-08-06 19:33:27,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 988.2ms TimeCoverageRelationStatistics Valid=198, Invalid=2252, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:33:27,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11651 states. [2021-08-06 19:33:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11651 to 11463. [2021-08-06 19:33:27,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11463 states, 11462 states have (on average 1.6075728494154597) internal successors, (18426), 11462 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11463 states to 11463 states and 18426 transitions. [2021-08-06 19:33:27,725 INFO L78 Accepts]: Start accepts. Automaton has 11463 states and 18426 transitions. Word has length 42 [2021-08-06 19:33:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:27,725 INFO L470 AbstractCegarLoop]: Abstraction has 11463 states and 18426 transitions. [2021-08-06 19:33:27,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 11463 states and 18426 transitions. [2021-08-06 19:33:27,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:27,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:27,733 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:27,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 19:33:27,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:27,934 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:27,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:27,934 INFO L82 PathProgramCache]: Analyzing trace with hash 126874149, now seen corresponding path program 106 times [2021-08-06 19:33:27,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:27,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009861088] [2021-08-06 19:33:27,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:27,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:28,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:28,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:28,248 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:28,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:28,275 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:28,276 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:28,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:28,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009861088] [2021-08-06 19:33:28,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009861088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:28,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450639884] [2021-08-06 19:33:28,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:28,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:28,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:28,299 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:28,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 19:33:31,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:31,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:31,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:32,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450639884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:32,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:32,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:33:32,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383781715] [2021-08-06 19:33:32,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:33:32,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:33:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:32,366 INFO L87 Difference]: Start difference. First operand 11463 states and 18426 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:34,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:34,069 INFO L93 Difference]: Finished difference Result 11745 states and 18819 transitions. [2021-08-06 19:33:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:33:34,069 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:33:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:34,081 INFO L225 Difference]: With dead ends: 11745 [2021-08-06 19:33:34,082 INFO L226 Difference]: Without dead ends: 11741 [2021-08-06 19:33:34,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1305.1ms TimeCoverageRelationStatistics Valid=271, Invalid=2485, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 19:33:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-08-06 19:33:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11493. [2021-08-06 19:33:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11493 states, 11492 states have (on average 1.6072920292377306) internal successors, (18471), 11492 states have internal predecessors, (18471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11493 states to 11493 states and 18471 transitions. [2021-08-06 19:33:34,206 INFO L78 Accepts]: Start accepts. Automaton has 11493 states and 18471 transitions. Word has length 42 [2021-08-06 19:33:34,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:34,206 INFO L470 AbstractCegarLoop]: Abstraction has 11493 states and 18471 transitions. [2021-08-06 19:33:34,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11493 states and 18471 transitions. [2021-08-06 19:33:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:34,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:34,214 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:34,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:34,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 19:33:34,415 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:34,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:34,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1709679923, now seen corresponding path program 107 times [2021-08-06 19:33:34,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:34,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851794818] [2021-08-06 19:33:34,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:34,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:34,763 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:34,764 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:34,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:34,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:34,815 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:34,816 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:34,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:34,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851794818] [2021-08-06 19:33:34,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851794818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:34,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653025525] [2021-08-06 19:33:34,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:34,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:34,838 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:34,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 19:33:38,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:33:38,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:38,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:38,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:38,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653025525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:38,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:38,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:33:38,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971095116] [2021-08-06 19:33:38,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:33:38,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:33:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:38,894 INFO L87 Difference]: Start difference. First operand 11493 states and 18471 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:40,248 INFO L93 Difference]: Finished difference Result 11977 states and 19177 transitions. [2021-08-06 19:33:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:33:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:33:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:40,262 INFO L225 Difference]: With dead ends: 11977 [2021-08-06 19:33:40,262 INFO L226 Difference]: Without dead ends: 11971 [2021-08-06 19:33:40,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1215.1ms TimeCoverageRelationStatistics Valid=320, Invalid=2436, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 19:33:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11971 states. [2021-08-06 19:33:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11971 to 11761. [2021-08-06 19:33:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11761 states, 11760 states have (on average 1.6054421768707483) internal successors, (18880), 11760 states have internal predecessors, (18880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:40,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11761 states to 11761 states and 18880 transitions. [2021-08-06 19:33:40,390 INFO L78 Accepts]: Start accepts. Automaton has 11761 states and 18880 transitions. Word has length 42 [2021-08-06 19:33:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:40,390 INFO L470 AbstractCegarLoop]: Abstraction has 11761 states and 18880 transitions. [2021-08-06 19:33:40,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 11761 states and 18880 transitions. [2021-08-06 19:33:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:40,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:40,398 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:40,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 19:33:40,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:40,599 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash 477177317, now seen corresponding path program 108 times [2021-08-06 19:33:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:40,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666138899] [2021-08-06 19:33:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:40,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:40,954 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:33:40,955 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:33:40,979 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:33:40,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:33:41,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:41,006 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:33:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:41,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:41,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666138899] [2021-08-06 19:33:41,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666138899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:41,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121885657] [2021-08-06 19:33:41,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:41,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:41,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:41,028 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:41,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 19:33:44,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:33:44,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:44,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:45,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121885657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:45,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:45,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:33:45,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125106979] [2021-08-06 19:33:45,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:33:45,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:45,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:33:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:45,159 INFO L87 Difference]: Start difference. First operand 11761 states and 18880 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:46,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:46,434 INFO L93 Difference]: Finished difference Result 12322 states and 19676 transitions. [2021-08-06 19:33:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:33:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:33:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:46,450 INFO L225 Difference]: With dead ends: 12322 [2021-08-06 19:33:46,451 INFO L226 Difference]: Without dead ends: 12310 [2021-08-06 19:33:46,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 987.4ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:33:46,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12310 states. [2021-08-06 19:33:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12310 to 11896. [2021-08-06 19:33:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 1.6042034468263977) internal successors, (19082), 11895 states have internal predecessors, (19082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 19082 transitions. [2021-08-06 19:33:46,584 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 19082 transitions. Word has length 42 [2021-08-06 19:33:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:46,584 INFO L470 AbstractCegarLoop]: Abstraction has 11896 states and 19082 transitions. [2021-08-06 19:33:46,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 19082 transitions. [2021-08-06 19:33:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:46,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:46,594 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:46,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 19:33:46,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:46,794 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:46,795 INFO L82 PathProgramCache]: Analyzing trace with hash -641449921, now seen corresponding path program 109 times [2021-08-06 19:33:46,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:46,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709121891] [2021-08-06 19:33:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:46,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:47,139 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:47,140 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:47,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:47,167 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:47,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:47,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:47,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:47,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709121891] [2021-08-06 19:33:47,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709121891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:47,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263883220] [2021-08-06 19:33:47,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:47,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:47,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:47,216 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:47,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 19:33:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:50,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:50,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:51,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263883220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:51,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:51,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:33:51,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181406619] [2021-08-06 19:33:51,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:33:51,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:51,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:33:51,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:51,293 INFO L87 Difference]: Start difference. First operand 11896 states and 19082 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:52,693 INFO L93 Difference]: Finished difference Result 12082 states and 19335 transitions. [2021-08-06 19:33:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 19:33:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:33:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:52,706 INFO L225 Difference]: With dead ends: 12082 [2021-08-06 19:33:52,706 INFO L226 Difference]: Without dead ends: 12078 [2021-08-06 19:33:52,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1207.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 19:33:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12078 states. [2021-08-06 19:33:52,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12078 to 11966. [2021-08-06 19:33:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11966 states, 11965 states have (on average 1.6036773923944838) internal successors, (19188), 11965 states have internal predecessors, (19188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11966 states to 11966 states and 19188 transitions. [2021-08-06 19:33:52,892 INFO L78 Accepts]: Start accepts. Automaton has 11966 states and 19188 transitions. Word has length 42 [2021-08-06 19:33:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:52,892 INFO L470 AbstractCegarLoop]: Abstraction has 11966 states and 19188 transitions. [2021-08-06 19:33:52,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11966 states and 19188 transitions. [2021-08-06 19:33:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:52,901 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:52,901 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:52,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 19:33:53,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:53,101 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:53,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash 210221217, now seen corresponding path program 110 times [2021-08-06 19:33:53,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:53,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385535640] [2021-08-06 19:33:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:53,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:53,427 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:53,429 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:33:53,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:53,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:33:53,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:53,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:33:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:53,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:53,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385535640] [2021-08-06 19:33:53,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385535640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:53,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782061204] [2021-08-06 19:33:53,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:53,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:53,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:53,509 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:53,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 19:33:57,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:33:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:33:57,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782061204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:57,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:57,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:33:57,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184245044] [2021-08-06 19:33:57,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:33:57,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:33:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:57,785 INFO L87 Difference]: Start difference. First operand 11966 states and 19188 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:59,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:59,350 INFO L93 Difference]: Finished difference Result 12232 states and 19562 transitions. [2021-08-06 19:33:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:33:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:33:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:59,366 INFO L225 Difference]: With dead ends: 12232 [2021-08-06 19:33:59,366 INFO L226 Difference]: Without dead ends: 12226 [2021-08-06 19:33:59,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1387.2ms TimeCoverageRelationStatistics Valid=260, Invalid=2496, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 19:33:59,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-08-06 19:33:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 12034. [2021-08-06 19:33:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 1.6032577079697499) internal successors, (19292), 12033 states have internal predecessors, (19292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 19292 transitions. [2021-08-06 19:33:59,502 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 19292 transitions. Word has length 42 [2021-08-06 19:33:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:59,502 INFO L470 AbstractCegarLoop]: Abstraction has 12034 states and 19292 transitions. [2021-08-06 19:33:59,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:33:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 19292 transitions. [2021-08-06 19:33:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:33:59,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:59,512 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:59,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:59,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:59,714 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:59,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1793026991, now seen corresponding path program 111 times [2021-08-06 19:33:59,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:59,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888181366] [2021-08-06 19:33:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:59,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:00,007 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:00,008 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:00,033 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:00,034 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:00,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:00,061 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:00,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:00,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888181366] [2021-08-06 19:34:00,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888181366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:00,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647888419] [2021-08-06 19:34:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:00,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:00,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:00,084 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:00,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 19:34:03,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:34:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:03,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:04,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647888419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:04,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:04,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-08-06 19:34:04,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120880092] [2021-08-06 19:34:04,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:34:04,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:34:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:04,277 INFO L87 Difference]: Start difference. First operand 12034 states and 19292 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 19:34:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:06,381 INFO L93 Difference]: Finished difference Result 12836 states and 20456 transitions. [2021-08-06 19:34:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 19:34:06,382 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 42 [2021-08-06 19:34:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:06,398 INFO L225 Difference]: With dead ends: 12836 [2021-08-06 19:34:06,398 INFO L226 Difference]: Without dead ends: 12830 [2021-08-06 19:34:06,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1444.3ms TimeCoverageRelationStatistics Valid=344, Invalid=3562, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 19:34:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12830 states. [2021-08-06 19:34:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12830 to 12398. [2021-08-06 19:34:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12398 states, 12397 states have (on average 1.603291118819069) internal successors, (19876), 12397 states have internal predecessors, (19876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12398 states to 12398 states and 19876 transitions. [2021-08-06 19:34:06,619 INFO L78 Accepts]: Start accepts. Automaton has 12398 states and 19876 transitions. Word has length 42 [2021-08-06 19:34:06,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:06,619 INFO L470 AbstractCegarLoop]: Abstraction has 12398 states and 19876 transitions. [2021-08-06 19:34:06,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 19:34:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12398 states and 19876 transitions. [2021-08-06 19:34:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:06,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:06,627 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:06,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 19:34:06,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 19:34:06,828 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 560524385, now seen corresponding path program 112 times [2021-08-06 19:34:06,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:06,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987218547] [2021-08-06 19:34:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:06,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:07,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:34:07,129 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:34:07,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:34:07,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:34:07,184 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:34:07,184 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:34:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:07,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:07,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987218547] [2021-08-06 19:34:07,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987218547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:07,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352267578] [2021-08-06 19:34:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:07,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:07,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:07,207 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:07,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 19:34:10,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:10,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:10,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:11,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352267578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:11,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:11,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:34:11,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558731006] [2021-08-06 19:34:11,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:34:11,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:11,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:34:11,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:34:11,527 INFO L87 Difference]: Start difference. First operand 12398 states and 19876 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:12,800 INFO L93 Difference]: Finished difference Result 12989 states and 20729 transitions. [2021-08-06 19:34:12,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:34:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:34:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:12,818 INFO L225 Difference]: With dead ends: 12989 [2021-08-06 19:34:12,818 INFO L226 Difference]: Without dead ends: 12977 [2021-08-06 19:34:12,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1071.0ms TimeCoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:34:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12977 states. [2021-08-06 19:34:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12977 to 12724. [2021-08-06 19:34:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12724 states, 12723 states have (on average 1.602216458382457) internal successors, (20385), 12723 states have internal predecessors, (20385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:12,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12724 states to 12724 states and 20385 transitions. [2021-08-06 19:34:12,958 INFO L78 Accepts]: Start accepts. Automaton has 12724 states and 20385 transitions. Word has length 42 [2021-08-06 19:34:12,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:12,958 INFO L470 AbstractCegarLoop]: Abstraction has 12724 states and 20385 transitions. [2021-08-06 19:34:12,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:12,958 INFO L276 IsEmpty]: Start isEmpty. Operand 12724 states and 20385 transitions. [2021-08-06 19:34:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:12,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:12,967 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:12,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2021-08-06 19:34:13,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 19:34:13,168 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash -558102853, now seen corresponding path program 113 times [2021-08-06 19:34:13,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:13,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323150615] [2021-08-06 19:34:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:13,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:13,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:13,474 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:13,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:13,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:13,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:13,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:13,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:13,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323150615] [2021-08-06 19:34:13,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323150615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:13,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76605316] [2021-08-06 19:34:13,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:13,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:13,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:13,548 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 19:34:17,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:34:17,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:17,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:17,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:17,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76605316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:17,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:17,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:34:17,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034506812] [2021-08-06 19:34:17,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:34:17,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:17,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:34:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:34:17,791 INFO L87 Difference]: Start difference. First operand 12724 states and 20385 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:19,361 INFO L93 Difference]: Finished difference Result 13704 states and 21855 transitions. [2021-08-06 19:34:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:34:19,362 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:34:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:19,379 INFO L225 Difference]: With dead ends: 13704 [2021-08-06 19:34:19,379 INFO L226 Difference]: Without dead ends: 13698 [2021-08-06 19:34:19,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1074.3ms TimeCoverageRelationStatistics Valid=223, Invalid=2327, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:34:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2021-08-06 19:34:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 13514. [2021-08-06 19:34:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13514 states, 13513 states have (on average 1.5988307555687116) internal successors, (21605), 13513 states have internal predecessors, (21605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13514 states to 13514 states and 21605 transitions. [2021-08-06 19:34:19,536 INFO L78 Accepts]: Start accepts. Automaton has 13514 states and 21605 transitions. Word has length 42 [2021-08-06 19:34:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:19,536 INFO L470 AbstractCegarLoop]: Abstraction has 13514 states and 21605 transitions. [2021-08-06 19:34:19,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 13514 states and 21605 transitions. [2021-08-06 19:34:19,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:19,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:19,545 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:19,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 19:34:19,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:19,747 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:19,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash 198695287, now seen corresponding path program 114 times [2021-08-06 19:34:19,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:19,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707039821] [2021-08-06 19:34:19,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:19,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:20,082 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:20,084 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:20,108 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:20,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:20,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:20,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:20,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:20,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707039821] [2021-08-06 19:34:20,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707039821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:20,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321465344] [2021-08-06 19:34:20,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:20,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:20,158 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:20,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 19:34:23,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:34:23,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:23,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321465344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:24,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:34:24,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228816734] [2021-08-06 19:34:24,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:34:24,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:34:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:34:24,370 INFO L87 Difference]: Start difference. First operand 13514 states and 21605 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:26,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:26,041 INFO L93 Difference]: Finished difference Result 13835 states and 22059 transitions. [2021-08-06 19:34:26,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:34:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:34:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:26,061 INFO L225 Difference]: With dead ends: 13835 [2021-08-06 19:34:26,061 INFO L226 Difference]: Without dead ends: 13829 [2021-08-06 19:34:26,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1074.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 19:34:26,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13829 states. [2021-08-06 19:34:26,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13829 to 13653. [2021-08-06 19:34:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13653 states, 13652 states have (on average 1.5981541166129505) internal successors, (21818), 13652 states have internal predecessors, (21818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13653 states to 13653 states and 21818 transitions. [2021-08-06 19:34:26,209 INFO L78 Accepts]: Start accepts. Automaton has 13653 states and 21818 transitions. Word has length 42 [2021-08-06 19:34:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:26,209 INFO L470 AbstractCegarLoop]: Abstraction has 13653 states and 21818 transitions. [2021-08-06 19:34:26,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand 13653 states and 21818 transitions. [2021-08-06 19:34:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:26,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:26,218 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:26,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-06 19:34:26,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 19:34:26,419 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:26,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1533704239, now seen corresponding path program 115 times [2021-08-06 19:34:26,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:26,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38532682] [2021-08-06 19:34:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:26,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:26,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:26,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:26,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:26,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:26,744 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:26,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:26,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:26,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38532682] [2021-08-06 19:34:26,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38532682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:26,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597850734] [2021-08-06 19:34:26,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:26,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:26,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:26,767 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:26,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 19:34:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:30,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:30,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:31,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597850734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:31,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:31,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:34:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795287154] [2021-08-06 19:34:31,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:34:31,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:31,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:34:31,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:34:31,138 INFO L87 Difference]: Start difference. First operand 13653 states and 21818 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:33,138 INFO L93 Difference]: Finished difference Result 14298 states and 22750 transitions. [2021-08-06 19:34:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 19:34:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:34:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:33,156 INFO L225 Difference]: With dead ends: 14298 [2021-08-06 19:34:33,156 INFO L226 Difference]: Without dead ends: 14286 [2021-08-06 19:34:33,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1557.8ms TimeCoverageRelationStatistics Valid=473, Invalid=3309, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 19:34:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14286 states. [2021-08-06 19:34:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14286 to 13974. [2021-08-06 19:34:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13974 states, 13973 states have (on average 1.5970800830172476) internal successors, (22316), 13973 states have internal predecessors, (22316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13974 states to 13974 states and 22316 transitions. [2021-08-06 19:34:33,327 INFO L78 Accepts]: Start accepts. Automaton has 13974 states and 22316 transitions. Word has length 42 [2021-08-06 19:34:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:33,327 INFO L470 AbstractCegarLoop]: Abstraction has 13974 states and 22316 transitions. [2021-08-06 19:34:33,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 13974 states and 22316 transitions. [2021-08-06 19:34:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:33,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:33,339 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:33,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-06 19:34:33,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 19:34:33,540 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash 548998455, now seen corresponding path program 116 times [2021-08-06 19:34:33,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:33,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015893511] [2021-08-06 19:34:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:33,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:33,906 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:34:33,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:34:33,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:34:33,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:34:33,958 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:34:33,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:34:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:33,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:33,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015893511] [2021-08-06 19:34:33,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015893511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:33,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122241136] [2021-08-06 19:34:33,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:33,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:33,981 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:33,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 19:34:37,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:38,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122241136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:38,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:38,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:34:38,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416936664] [2021-08-06 19:34:38,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:34:38,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:38,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:34:38,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:34:38,420 INFO L87 Difference]: Start difference. First operand 13974 states and 22316 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:40,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:40,157 INFO L93 Difference]: Finished difference Result 14826 states and 23542 transitions. [2021-08-06 19:34:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:34:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:34:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:40,176 INFO L225 Difference]: With dead ends: 14826 [2021-08-06 19:34:40,176 INFO L226 Difference]: Without dead ends: 14796 [2021-08-06 19:34:40,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1273.1ms TimeCoverageRelationStatistics Valid=325, Invalid=2867, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 19:34:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14796 states. [2021-08-06 19:34:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14796 to 13717. [2021-08-06 19:34:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13717 states, 13716 states have (on average 1.5982064741907263) internal successors, (21921), 13716 states have internal predecessors, (21921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13717 states to 13717 states and 21921 transitions. [2021-08-06 19:34:40,332 INFO L78 Accepts]: Start accepts. Automaton has 13717 states and 21921 transitions. Word has length 42 [2021-08-06 19:34:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:40,332 INFO L470 AbstractCegarLoop]: Abstraction has 13717 states and 21921 transitions. [2021-08-06 19:34:40,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 13717 states and 21921 transitions. [2021-08-06 19:34:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:40,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:40,342 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:40,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:40,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 19:34:40,546 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash -339852937, now seen corresponding path program 117 times [2021-08-06 19:34:40,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:40,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736187335] [2021-08-06 19:34:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:40,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:40,707 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:34:40,708 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:34:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:40,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736187335] [2021-08-06 19:34:40,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736187335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:40,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892036819] [2021-08-06 19:34:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:40,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:40,729 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:40,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 19:34:44,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:34:44,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:44,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:45,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892036819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:45,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:45,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-08-06 19:34:45,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541015994] [2021-08-06 19:34:45,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:34:45,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:45,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:34:45,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:45,142 INFO L87 Difference]: Start difference. First operand 13717 states and 21921 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:45,897 INFO L93 Difference]: Finished difference Result 14654 states and 23283 transitions. [2021-08-06 19:34:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:34:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:34:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:45,914 INFO L225 Difference]: With dead ends: 14654 [2021-08-06 19:34:45,914 INFO L226 Difference]: Without dead ends: 14630 [2021-08-06 19:34:45,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:34:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14630 states. [2021-08-06 19:34:46,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14630 to 14241. [2021-08-06 19:34:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14241 states, 14240 states have (on average 1.5997893258426967) internal successors, (22781), 14240 states have internal predecessors, (22781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14241 states to 14241 states and 22781 transitions. [2021-08-06 19:34:46,076 INFO L78 Accepts]: Start accepts. Automaton has 14241 states and 22781 transitions. Word has length 42 [2021-08-06 19:34:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:46,076 INFO L470 AbstractCegarLoop]: Abstraction has 14241 states and 22781 transitions. [2021-08-06 19:34:46,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14241 states and 22781 transitions. [2021-08-06 19:34:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:46,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:46,087 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:46,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 19:34:46,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 19:34:46,288 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:46,288 INFO L82 PathProgramCache]: Analyzing trace with hash 272055253, now seen corresponding path program 118 times [2021-08-06 19:34:46,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:46,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593026485] [2021-08-06 19:34:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:46,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:46,573 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:46,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:46,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:46,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:46,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:46,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:46,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:46,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593026485] [2021-08-06 19:34:46,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593026485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:46,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761871913] [2021-08-06 19:34:46,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:46,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:46,654 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:46,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 19:34:50,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:50,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:50,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:51,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761871913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:51,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:51,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:34:51,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705457637] [2021-08-06 19:34:51,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:34:51,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:51,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:34:51,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:34:51,130 INFO L87 Difference]: Start difference. First operand 14241 states and 22781 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:52,486 INFO L93 Difference]: Finished difference Result 14680 states and 23426 transitions. [2021-08-06 19:34:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:34:52,486 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:34:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:52,508 INFO L225 Difference]: With dead ends: 14680 [2021-08-06 19:34:52,508 INFO L226 Difference]: Without dead ends: 14674 [2021-08-06 19:34:52,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1134.0ms TimeCoverageRelationStatistics Valid=286, Invalid=2264, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 19:34:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14674 states. [2021-08-06 19:34:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14674 to 14366. [2021-08-06 19:34:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14366 states, 14365 states have (on average 1.5997215454229028) internal successors, (22980), 14365 states have internal predecessors, (22980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14366 states to 14366 states and 22980 transitions. [2021-08-06 19:34:52,672 INFO L78 Accepts]: Start accepts. Automaton has 14366 states and 22980 transitions. Word has length 42 [2021-08-06 19:34:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:52,672 INFO L470 AbstractCegarLoop]: Abstraction has 14366 states and 22980 transitions. [2021-08-06 19:34:52,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:34:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 14366 states and 22980 transitions. [2021-08-06 19:34:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:34:52,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:52,685 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:52,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 19:34:52,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:52,893 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash 519852075, now seen corresponding path program 119 times [2021-08-06 19:34:52,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:52,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580855901] [2021-08-06 19:34:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:52,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:53,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:53,179 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:34:53,204 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:53,205 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:34:53,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:53,231 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:34:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:53,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:53,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580855901] [2021-08-06 19:34:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580855901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:53,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129222217] [2021-08-06 19:34:53,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:53,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:53,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:53,254 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:53,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 19:34:57,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:34:57,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:57,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129222217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:57,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:57,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-08-06 19:34:57,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672247772] [2021-08-06 19:34:57,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:34:57,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:34:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:34:57,883 INFO L87 Difference]: Start difference. First operand 14366 states and 22980 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 19:34:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:59,979 INFO L93 Difference]: Finished difference Result 14662 states and 23441 transitions. [2021-08-06 19:34:59,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 19:34:59,979 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 42 [2021-08-06 19:34:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:59,999 INFO L225 Difference]: With dead ends: 14662 [2021-08-06 19:35:00,000 INFO L226 Difference]: Without dead ends: 14656 [2021-08-06 19:35:00,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 1811.0ms TimeCoverageRelationStatistics Valid=626, Invalid=4486, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 19:35:00,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14656 states. [2021-08-06 19:35:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14656 to 14362. [2021-08-06 19:35:00,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14362 states, 14361 states have (on average 1.599610055010097) internal successors, (22972), 14361 states have internal predecessors, (22972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14362 states to 14362 states and 22972 transitions. [2021-08-06 19:35:00,160 INFO L78 Accepts]: Start accepts. Automaton has 14362 states and 22972 transitions. Word has length 42 [2021-08-06 19:35:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:00,160 INFO L470 AbstractCegarLoop]: Abstraction has 14362 states and 22972 transitions. [2021-08-06 19:35:00,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 19:35:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 14362 states and 22972 transitions. [2021-08-06 19:35:00,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:00,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:00,170 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:00,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 19:35:00,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:00,372 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:00,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:00,372 INFO L82 PathProgramCache]: Analyzing trace with hash -712650531, now seen corresponding path program 120 times [2021-08-06 19:35:00,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:00,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043669679] [2021-08-06 19:35:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:00,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:00,712 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:35:00,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:35:00,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:35:00,740 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:35:00,765 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:00,765 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:00,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043669679] [2021-08-06 19:35:00,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043669679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:00,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407833489] [2021-08-06 19:35:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:00,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:00,788 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:00,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 19:35:04,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:35:04,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:04,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:04,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:05,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407833489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:05,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:05,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:35:05,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45436552] [2021-08-06 19:35:05,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:35:05,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:35:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:35:05,375 INFO L87 Difference]: Start difference. First operand 14362 states and 22972 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:35:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:07,326 INFO L93 Difference]: Finished difference Result 15484 states and 24628 transitions. [2021-08-06 19:35:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 19:35:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:35:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:07,349 INFO L225 Difference]: With dead ends: 15484 [2021-08-06 19:35:07,349 INFO L226 Difference]: Without dead ends: 15454 [2021-08-06 19:35:07,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1203.6ms TimeCoverageRelationStatistics Valid=312, Invalid=2880, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 19:35:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15454 states. [2021-08-06 19:35:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15454 to 14370. [2021-08-06 19:35:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14370 states, 14369 states have (on average 1.599832973762962) internal successors, (22988), 14369 states have internal predecessors, (22988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14370 states to 14370 states and 22988 transitions. [2021-08-06 19:35:07,518 INFO L78 Accepts]: Start accepts. Automaton has 14370 states and 22988 transitions. Word has length 42 [2021-08-06 19:35:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:07,518 INFO L470 AbstractCegarLoop]: Abstraction has 14370 states and 22988 transitions. [2021-08-06 19:35:07,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:35:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 14370 states and 22988 transitions. [2021-08-06 19:35:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:07,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:07,528 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:07,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 19:35:07,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-08-06 19:35:07,729 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1295801429, now seen corresponding path program 121 times [2021-08-06 19:35:07,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:07,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287452434] [2021-08-06 19:35:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:07,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:08,039 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:35:08,040 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 78.6 percent of original size [2021-08-06 19:35:08,065 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:35:08,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 77.8 percent of original size [2021-08-06 19:35:08,091 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:35:08,092 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 10, result has 47.4 percent of original size [2021-08-06 19:35:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:08,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:08,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287452434] [2021-08-06 19:35:08,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287452434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:08,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346421259] [2021-08-06 19:35:08,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:08,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:08,115 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:08,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 19:35:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:12,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346421259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:12,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:12,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:35:12,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347955848] [2021-08-06 19:35:12,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:35:12,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:12,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:35:12,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:35:12,715 INFO L87 Difference]: Start difference. First operand 14370 states and 22988 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:35:14,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:14,154 INFO L93 Difference]: Finished difference Result 14835 states and 23682 transitions. [2021-08-06 19:35:14,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:35:14,155 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:35:14,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:14,230 INFO L225 Difference]: With dead ends: 14835 [2021-08-06 19:35:14,230 INFO L226 Difference]: Without dead ends: 14829 [2021-08-06 19:35:14,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1254.7ms TimeCoverageRelationStatistics Valid=327, Invalid=2535, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 19:35:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14829 states. [2021-08-06 19:35:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14829 to 14650. [2021-08-06 19:35:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14650 states, 14649 states have (on average 1.6009283910164516) internal successors, (23452), 14649 states have internal predecessors, (23452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14650 states to 14650 states and 23452 transitions. [2021-08-06 19:35:14,384 INFO L78 Accepts]: Start accepts. Automaton has 14650 states and 23452 transitions. Word has length 42 [2021-08-06 19:35:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:14,384 INFO L470 AbstractCegarLoop]: Abstraction has 14650 states and 23452 transitions. [2021-08-06 19:35:14,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:35:14,385 INFO L276 IsEmpty]: Start isEmpty. Operand 14650 states and 23452 transitions. [2021-08-06 19:35:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:14,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:14,397 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:14,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 19:35:14,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:14,599 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2014460083, now seen corresponding path program 122 times [2021-08-06 19:35:14,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:14,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337373944] [2021-08-06 19:35:14,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:14,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:14,887 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:35:14,889 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.9 percent of original size [2021-08-06 19:35:14,914 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:35:14,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 75.0 percent of original size [2021-08-06 19:35:14,940 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:14,941 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:14,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:14,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337373944] [2021-08-06 19:35:14,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337373944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:14,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746681555] [2021-08-06 19:35:14,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:14,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:14,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:14,964 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:14,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 19:35:18,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:19,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746681555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:19,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2021-08-06 19:35:19,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473328423] [2021-08-06 19:35:19,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:35:19,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:35:19,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=737, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:35:19,748 INFO L87 Difference]: Start difference. First operand 14650 states and 23452 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:35:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:20,996 INFO L93 Difference]: Finished difference Result 15212 states and 24267 transitions. [2021-08-06 19:35:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:35:20,997 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 42 [2021-08-06 19:35:20,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:21,015 INFO L225 Difference]: With dead ends: 15212 [2021-08-06 19:35:21,016 INFO L226 Difference]: Without dead ends: 15200 [2021-08-06 19:35:21,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1023.6ms TimeCoverageRelationStatistics Valid=211, Invalid=2045, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:35:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15200 states. [2021-08-06 19:35:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15200 to 14662. [2021-08-06 19:35:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14662 states, 14661 states have (on average 1.6011186140099585) internal successors, (23474), 14661 states have internal predecessors, (23474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14662 states to 14662 states and 23474 transitions. [2021-08-06 19:35:21,187 INFO L78 Accepts]: Start accepts. Automaton has 14662 states and 23474 transitions. Word has length 42 [2021-08-06 19:35:21,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:21,187 INFO L470 AbstractCegarLoop]: Abstraction has 14662 states and 23474 transitions. [2021-08-06 19:35:21,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 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 19:35:21,187 INFO L276 IsEmpty]: Start isEmpty. Operand 14662 states and 23474 transitions. [2021-08-06 19:35:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:21,198 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:21,198 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:21,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:21,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:21,399 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2046635869, now seen corresponding path program 123 times [2021-08-06 19:35:21,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:21,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207833876] [2021-08-06 19:35:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:21,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:21,594 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:21,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:21,612 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:21,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:21,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207833876] [2021-08-06 19:35:21,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207833876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:21,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159708644] [2021-08-06 19:35:21,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:21,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:21,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:21,613 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:21,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 19:35:25,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:35:25,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:26,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159708644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:26,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:26,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:35:26,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324196160] [2021-08-06 19:35:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:35:26,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:35:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:26,237 INFO L87 Difference]: Start difference. First operand 14662 states and 23474 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:26,986 INFO L93 Difference]: Finished difference Result 17022 states and 27120 transitions. [2021-08-06 19:35:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:35:26,986 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:35:26,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:27,007 INFO L225 Difference]: With dead ends: 17022 [2021-08-06 19:35:27,008 INFO L226 Difference]: Without dead ends: 17016 [2021-08-06 19:35:27,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 525.6ms TimeCoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:35:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17016 states. [2021-08-06 19:35:27,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17016 to 15114. [2021-08-06 19:35:27,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15114 states, 15113 states have (on average 1.6027922980215707) internal successors, (24223), 15113 states have internal predecessors, (24223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15114 states to 15114 states and 24223 transitions. [2021-08-06 19:35:27,228 INFO L78 Accepts]: Start accepts. Automaton has 15114 states and 24223 transitions. Word has length 42 [2021-08-06 19:35:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:27,228 INFO L470 AbstractCegarLoop]: Abstraction has 15114 states and 24223 transitions. [2021-08-06 19:35:27,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 15114 states and 24223 transitions. [2021-08-06 19:35:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:27,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:27,240 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:27,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:27,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 19:35:27,440 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1061930085, now seen corresponding path program 124 times [2021-08-06 19:35:27,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:27,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926407562] [2021-08-06 19:35:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:27,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:27,637 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:27,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:27,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:27,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926407562] [2021-08-06 19:35:27,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926407562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:27,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914984920] [2021-08-06 19:35:27,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:27,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:27,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:27,656 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:27,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 19:35:31,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:32,398 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:32,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914984920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:32,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:32,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:35:32,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540688553] [2021-08-06 19:35:32,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:35:32,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:35:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:32,399 INFO L87 Difference]: Start difference. First operand 15114 states and 24223 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:32,893 INFO L93 Difference]: Finished difference Result 15437 states and 24675 transitions. [2021-08-06 19:35:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:35:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:35:32,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:32,910 INFO L225 Difference]: With dead ends: 15437 [2021-08-06 19:35:32,910 INFO L226 Difference]: Without dead ends: 15431 [2021-08-06 19:35:32,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:35:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15431 states. [2021-08-06 19:35:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15431 to 15303. [2021-08-06 19:35:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15303 states, 15302 states have (on average 1.601359299437982) internal successors, (24504), 15302 states have internal predecessors, (24504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:33,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15303 states to 15303 states and 24504 transitions. [2021-08-06 19:35:33,081 INFO L78 Accepts]: Start accepts. Automaton has 15303 states and 24504 transitions. Word has length 42 [2021-08-06 19:35:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:33,081 INFO L470 AbstractCegarLoop]: Abstraction has 15303 states and 24504 transitions. [2021-08-06 19:35:33,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15303 states and 24504 transitions. [2021-08-06 19:35:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:33,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:33,092 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:33,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 19:35:33,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 19:35:33,292 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2035109939, now seen corresponding path program 125 times [2021-08-06 19:35:33,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:33,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382266657] [2021-08-06 19:35:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:33,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:33,504 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:33,505 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:33,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382266657] [2021-08-06 19:35:33,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382266657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:33,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385524182] [2021-08-06 19:35:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:33,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:33,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:33,529 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 19:35:37,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:35:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:38,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385524182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:38,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:38,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-06 19:35:38,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709801683] [2021-08-06 19:35:38,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:35:38,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:35:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:35:38,302 INFO L87 Difference]: Start difference. First operand 15303 states and 24504 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 19:35:39,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:39,203 INFO L93 Difference]: Finished difference Result 16079 states and 25645 transitions. [2021-08-06 19:35:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:35:39,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:35:39,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:39,226 INFO L225 Difference]: With dead ends: 16079 [2021-08-06 19:35:39,227 INFO L226 Difference]: Without dead ends: 16067 [2021-08-06 19:35:39,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 713.6ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:35:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16067 states. [2021-08-06 19:35:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16067 to 15739. [2021-08-06 19:35:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15739 states, 15738 states have (on average 1.6013470580759943) internal successors, (25202), 15738 states have internal predecessors, (25202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15739 states to 15739 states and 25202 transitions. [2021-08-06 19:35:39,409 INFO L78 Accepts]: Start accepts. Automaton has 15739 states and 25202 transitions. Word has length 42 [2021-08-06 19:35:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:39,410 INFO L470 AbstractCegarLoop]: Abstraction has 15739 states and 25202 transitions. [2021-08-06 19:35:39,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 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 19:35:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 15739 states and 25202 transitions. [2021-08-06 19:35:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:39,422 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:39,422 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:39,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 19:35:39,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 19:35:39,622 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:39,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:39,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1203777211, now seen corresponding path program 126 times [2021-08-06 19:35:39,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:39,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107450754] [2021-08-06 19:35:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:39,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:39,856 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:39,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:39,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:39,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107450754] [2021-08-06 19:35:39,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107450754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:39,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100733850] [2021-08-06 19:35:39,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:39,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:39,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:39,875 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:39,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 19:35:43,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:35:43,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:43,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:44,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100733850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:44,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:44,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-08-06 19:35:44,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433632052] [2021-08-06 19:35:44,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:35:44,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:44,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:35:44,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:35:44,679 INFO L87 Difference]: Start difference. First operand 15739 states and 25202 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:45,212 INFO L93 Difference]: Finished difference Result 17044 states and 27170 transitions. [2021-08-06 19:35:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:35:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:35:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:45,237 INFO L225 Difference]: With dead ends: 17044 [2021-08-06 19:35:45,237 INFO L226 Difference]: Without dead ends: 17020 [2021-08-06 19:35:45,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:35:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-08-06 19:35:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 16090. [2021-08-06 19:35:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16090 states, 16089 states have (on average 1.601466840698614) internal successors, (25766), 16089 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16090 states to 16090 states and 25766 transitions. [2021-08-06 19:35:45,464 INFO L78 Accepts]: Start accepts. Automaton has 16090 states and 25766 transitions. Word has length 42 [2021-08-06 19:35:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:45,464 INFO L470 AbstractCegarLoop]: Abstraction has 16090 states and 25766 transitions. [2021-08-06 19:35:45,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 16090 states and 25766 transitions. [2021-08-06 19:35:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:45,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:45,479 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:45,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:45,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:45,689 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1741723553, now seen corresponding path program 127 times [2021-08-06 19:35:45,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:45,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496260533] [2021-08-06 19:35:45,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:45,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:45,877 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:45,878 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:45,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:45,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496260533] [2021-08-06 19:35:45,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496260533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:45,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730734829] [2021-08-06 19:35:45,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:45,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:45,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:45,895 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:45,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 19:35:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:50,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 19:35:50,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730734829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:50,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:50,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 19:35:50,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557678098] [2021-08-06 19:35:50,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:35:50,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:35:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:35:50,775 INFO L87 Difference]: Start difference. First operand 16090 states and 25766 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:35:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:51,219 INFO L93 Difference]: Finished difference Result 16690 states and 26644 transitions. [2021-08-06 19:35:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:35:51,220 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 42 [2021-08-06 19:35:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:51,242 INFO L225 Difference]: With dead ends: 16690 [2021-08-06 19:35:51,243 INFO L226 Difference]: Without dead ends: 16672 [2021-08-06 19:35:51,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:35:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-08-06 19:35:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 16501. [2021-08-06 19:35:51,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16501 states, 16500 states have (on average 1.6003636363636364) internal successors, (26406), 16500 states have internal predecessors, (26406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16501 states to 16501 states and 26406 transitions. [2021-08-06 19:35:51,439 INFO L78 Accepts]: Start accepts. Automaton has 16501 states and 26406 transitions. Word has length 42 [2021-08-06 19:35:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:51,439 INFO L470 AbstractCegarLoop]: Abstraction has 16501 states and 26406 transitions. [2021-08-06 19:35:51,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:35:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 16501 states and 26406 transitions. [2021-08-06 19:35:51,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:51,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:51,451 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:51,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 19:35:51,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 19:35:51,652 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:51,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:51,652 INFO L82 PathProgramCache]: Analyzing trace with hash 773460953, now seen corresponding path program 128 times [2021-08-06 19:35:51,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:51,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445658903] [2021-08-06 19:35:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:51,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:51,847 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:51,848 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:51,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:51,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445658903] [2021-08-06 19:35:51,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445658903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:51,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577918267] [2021-08-06 19:35:51,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:51,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:51,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:51,866 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:51,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 19:35:56,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:56,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:56,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:35:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:56,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577918267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:56,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:56,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-08-06 19:35:56,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66520547] [2021-08-06 19:35:56,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 19:35:56,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 19:35:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:35:56,806 INFO L87 Difference]: Start difference. First operand 16501 states and 26406 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 19:35:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:57,312 INFO L93 Difference]: Finished difference Result 16851 states and 26937 transitions. [2021-08-06 19:35:57,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:35:57,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 42 [2021-08-06 19:35:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:57,334 INFO L225 Difference]: With dead ends: 16851 [2021-08-06 19:35:57,335 INFO L226 Difference]: Without dead ends: 16845 [2021-08-06 19:35:57,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 463.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:35:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16845 states. [2021-08-06 19:35:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16845 to 16646. [2021-08-06 19:35:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16646 states, 16645 states have (on average 1.6011414839291078) internal successors, (26651), 16645 states have internal predecessors, (26651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16646 states to 16646 states and 26651 transitions. [2021-08-06 19:35:57,534 INFO L78 Accepts]: Start accepts. Automaton has 16646 states and 26651 transitions. Word has length 42 [2021-08-06 19:35:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:57,534 INFO L470 AbstractCegarLoop]: Abstraction has 16646 states and 26651 transitions. [2021-08-06 19:35:57,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 19:35:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 16646 states and 26651 transitions. [2021-08-06 19:35:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:35:57,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:57,546 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:57,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 19:35:57,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 19:35:57,747 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:57,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:57,747 INFO L82 PathProgramCache]: Analyzing trace with hash 928504037, now seen corresponding path program 129 times [2021-08-06 19:35:57,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:57,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518729085] [2021-08-06 19:35:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:57,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:57,939 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:57,940 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:35:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:57,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:57,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518729085] [2021-08-06 19:35:57,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518729085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:57,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467262713] [2021-08-06 19:35:57,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:57,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:57,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:57,957 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:57,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 19:36:02,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:36:02,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:02,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:02,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:02,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467262713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:02,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:02,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:36:02,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953578298] [2021-08-06 19:36:02,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:02,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:02,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:02,809 INFO L87 Difference]: Start difference. First operand 16646 states and 26651 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:03,665 INFO L93 Difference]: Finished difference Result 18290 states and 29099 transitions. [2021-08-06 19:36:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:36:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:36:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:03,692 INFO L225 Difference]: With dead ends: 18290 [2021-08-06 19:36:03,692 INFO L226 Difference]: Without dead ends: 18284 [2021-08-06 19:36:03,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:36:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18284 states. [2021-08-06 19:36:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18284 to 17998. [2021-08-06 19:36:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17998 states, 17997 states have (on average 1.597932988831472) internal successors, (28758), 17997 states have internal predecessors, (28758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17998 states to 17998 states and 28758 transitions. [2021-08-06 19:36:03,898 INFO L78 Accepts]: Start accepts. Automaton has 17998 states and 28758 transitions. Word has length 42 [2021-08-06 19:36:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:03,898 INFO L470 AbstractCegarLoop]: Abstraction has 17998 states and 28758 transitions. [2021-08-06 19:36:03,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 17998 states and 28758 transitions. [2021-08-06 19:36:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:03,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:03,911 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:03,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:04,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:04,111 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:04,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:04,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1249581353, now seen corresponding path program 130 times [2021-08-06 19:36:04,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:04,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020979200] [2021-08-06 19:36:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:04,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:04,291 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:04,292 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:04,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:04,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020979200] [2021-08-06 19:36:04,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020979200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:04,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507071279] [2021-08-06 19:36:04,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:36:04,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:04,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:04,309 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:04,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 19:36:08,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:36:08,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:36:09,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507071279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:09,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:09,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 19:36:09,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565716426] [2021-08-06 19:36:09,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:36:09,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:36:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:36:09,456 INFO L87 Difference]: Start difference. First operand 17998 states and 28758 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:36:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:09,985 INFO L93 Difference]: Finished difference Result 19562 states and 31133 transitions. [2021-08-06 19:36:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:36:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 42 [2021-08-06 19:36:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:10,018 INFO L225 Difference]: With dead ends: 19562 [2021-08-06 19:36:10,018 INFO L226 Difference]: Without dead ends: 19544 [2021-08-06 19:36:10,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:36:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19544 states. [2021-08-06 19:36:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19544 to 17602. [2021-08-06 19:36:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17602 states, 17601 states have (on average 1.5973524231577751) internal successors, (28115), 17601 states have internal predecessors, (28115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17602 states to 17602 states and 28115 transitions. [2021-08-06 19:36:10,237 INFO L78 Accepts]: Start accepts. Automaton has 17602 states and 28115 transitions. Word has length 42 [2021-08-06 19:36:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:10,237 INFO L470 AbstractCegarLoop]: Abstraction has 17602 states and 28115 transitions. [2021-08-06 19:36:10,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 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 19:36:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 17602 states and 28115 transitions. [2021-08-06 19:36:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:10,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:10,250 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:10,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 19:36:10,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:10,450 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash 389955813, now seen corresponding path program 131 times [2021-08-06 19:36:10,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:10,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266289082] [2021-08-06 19:36:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:10,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:10,631 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:10,632 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:10,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:10,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266289082] [2021-08-06 19:36:10,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266289082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:10,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082445956] [2021-08-06 19:36:10,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:10,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:10,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:10,649 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:10,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 19:36:15,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:36:15,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:15,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:15,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082445956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:15,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:15,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:36:15,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665451239] [2021-08-06 19:36:15,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:15,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:15,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:15,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:15,731 INFO L87 Difference]: Start difference. First operand 17602 states and 28115 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:16,357 INFO L93 Difference]: Finished difference Result 18641 states and 29628 transitions. [2021-08-06 19:36:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:36:16,358 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:36:16,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:16,380 INFO L225 Difference]: With dead ends: 18641 [2021-08-06 19:36:16,380 INFO L226 Difference]: Without dead ends: 18605 [2021-08-06 19:36:16,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:36:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18605 states. [2021-08-06 19:36:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18605 to 17813. [2021-08-06 19:36:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17813 states, 17812 states have (on average 1.5966202560071863) internal successors, (28439), 17812 states have internal predecessors, (28439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17813 states to 17813 states and 28439 transitions. [2021-08-06 19:36:16,584 INFO L78 Accepts]: Start accepts. Automaton has 17813 states and 28439 transitions. Word has length 42 [2021-08-06 19:36:16,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:16,584 INFO L470 AbstractCegarLoop]: Abstraction has 17813 states and 28439 transitions. [2021-08-06 19:36:16,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 17813 states and 28439 transitions. [2021-08-06 19:36:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:16,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:16,597 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:16,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 19:36:16,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:16,797 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:16,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1985175181, now seen corresponding path program 132 times [2021-08-06 19:36:16,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:16,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798588583] [2021-08-06 19:36:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:16,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:17,002 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:17,003 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:17,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:17,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798588583] [2021-08-06 19:36:17,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798588583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:17,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921939376] [2021-08-06 19:36:17,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:17,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:17,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:17,019 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:17,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 19:36:21,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:36:21,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:22,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921939376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:22,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:22,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 19:36:22,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797723861] [2021-08-06 19:36:22,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:22,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:22,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:22,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:22,149 INFO L87 Difference]: Start difference. First operand 17813 states and 28439 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:22,786 INFO L93 Difference]: Finished difference Result 18184 states and 29013 transitions. [2021-08-06 19:36:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:36:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:36:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:22,809 INFO L225 Difference]: With dead ends: 18184 [2021-08-06 19:36:22,809 INFO L226 Difference]: Without dead ends: 18178 [2021-08-06 19:36:22,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 594.1ms TimeCoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:36:22,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-08-06 19:36:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17936. [2021-08-06 19:36:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17936 states, 17935 states have (on average 1.5969333705046) internal successors, (28641), 17935 states have internal predecessors, (28641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17936 states to 17936 states and 28641 transitions. [2021-08-06 19:36:23,017 INFO L78 Accepts]: Start accepts. Automaton has 17936 states and 28641 transitions. Word has length 42 [2021-08-06 19:36:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:23,017 INFO L470 AbstractCegarLoop]: Abstraction has 17936 states and 28641 transitions. [2021-08-06 19:36:23,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 17936 states and 28641 transitions. [2021-08-06 19:36:23,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:23,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:23,029 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:23,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2021-08-06 19:36:23,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:23,230 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:23,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:23,230 INFO L82 PathProgramCache]: Analyzing trace with hash 607200647, now seen corresponding path program 133 times [2021-08-06 19:36:23,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:23,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590583987] [2021-08-06 19:36:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:23,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:23,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:23,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:23,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:23,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590583987] [2021-08-06 19:36:23,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590583987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:23,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724537141] [2021-08-06 19:36:23,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:23,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:23,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:23,437 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:23,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 19:36:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 19:36:28,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724537141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:28,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:28,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 19:36:28,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117315138] [2021-08-06 19:36:28,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:36:28,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:28,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:36:28,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:36:28,631 INFO L87 Difference]: Start difference. First operand 17936 states and 28641 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 19:36:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:29,136 INFO L93 Difference]: Finished difference Result 18714 states and 29812 transitions. [2021-08-06 19:36:29,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:36:29,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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) Word has length 42 [2021-08-06 19:36:29,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:29,162 INFO L225 Difference]: With dead ends: 18714 [2021-08-06 19:36:29,162 INFO L226 Difference]: Without dead ends: 18696 [2021-08-06 19:36:29,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:36:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18696 states. [2021-08-06 19:36:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18696 to 17392. [2021-08-06 19:36:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17392 states, 17391 states have (on average 1.5954229199010983) internal successors, (27746), 17391 states have internal predecessors, (27746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17392 states to 17392 states and 27746 transitions. [2021-08-06 19:36:29,371 INFO L78 Accepts]: Start accepts. Automaton has 17392 states and 27746 transitions. Word has length 42 [2021-08-06 19:36:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:29,371 INFO L470 AbstractCegarLoop]: Abstraction has 17392 states and 27746 transitions. [2021-08-06 19:36:29,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 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 19:36:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 17392 states and 27746 transitions. [2021-08-06 19:36:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:29,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:29,384 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:29,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:29,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 19:36:29,584 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:29,585 INFO L82 PathProgramCache]: Analyzing trace with hash -136178817, now seen corresponding path program 134 times [2021-08-06 19:36:29,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:29,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209965913] [2021-08-06 19:36:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:29,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:29,767 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:29,768 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:29,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:29,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209965913] [2021-08-06 19:36:29,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209965913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:29,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441425946] [2021-08-06 19:36:29,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:36:29,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:29,785 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:29,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 19:36:34,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:36:34,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:34,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:34,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:35,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441425946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:35,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:35,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-08-06 19:36:35,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328728392] [2021-08-06 19:36:35,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:36:35,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:36:35,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:36:35,004 INFO L87 Difference]: Start difference. First operand 17392 states and 27746 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:35,493 INFO L93 Difference]: Finished difference Result 17728 states and 28220 transitions. [2021-08-06 19:36:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:36:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:36:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:35,517 INFO L225 Difference]: With dead ends: 17728 [2021-08-06 19:36:35,517 INFO L226 Difference]: Without dead ends: 17710 [2021-08-06 19:36:35,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:36:35,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17710 states. [2021-08-06 19:36:35,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17710 to 17392. [2021-08-06 19:36:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17392 states, 17391 states have (on average 1.5954229199010983) internal successors, (27746), 17391 states have internal predecessors, (27746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17392 states to 17392 states and 27746 transitions. [2021-08-06 19:36:35,849 INFO L78 Accepts]: Start accepts. Automaton has 17392 states and 27746 transitions. Word has length 42 [2021-08-06 19:36:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:35,849 INFO L470 AbstractCegarLoop]: Abstraction has 17392 states and 27746 transitions. [2021-08-06 19:36:35,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand 17392 states and 27746 transitions. [2021-08-06 19:36:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:35,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:35,860 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:35,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:36,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 19:36:36,060 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:36,060 INFO L82 PathProgramCache]: Analyzing trace with hash 723526195, now seen corresponding path program 135 times [2021-08-06 19:36:36,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:36,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809460489] [2021-08-06 19:36:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:36,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:36,253 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:36,254 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:36,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:36,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809460489] [2021-08-06 19:36:36,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809460489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:36,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760263771] [2021-08-06 19:36:36,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:36:36,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:36,271 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:36,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 19:36:40,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:36:40,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:40,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:41,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760263771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:41,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:41,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:36:41,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123801940] [2021-08-06 19:36:41,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:41,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:41,426 INFO L87 Difference]: Start difference. First operand 17392 states and 27746 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:42,164 INFO L93 Difference]: Finished difference Result 19707 states and 31169 transitions. [2021-08-06 19:36:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:36:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:36:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:42,190 INFO L225 Difference]: With dead ends: 19707 [2021-08-06 19:36:42,191 INFO L226 Difference]: Without dead ends: 19701 [2021-08-06 19:36:42,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:36:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19701 states. [2021-08-06 19:36:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19701 to 17828. [2021-08-06 19:36:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17828 states, 17827 states have (on average 1.5946036910304595) internal successors, (28427), 17827 states have internal predecessors, (28427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17828 states to 17828 states and 28427 transitions. [2021-08-06 19:36:42,544 INFO L78 Accepts]: Start accepts. Automaton has 17828 states and 28427 transitions. Word has length 42 [2021-08-06 19:36:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 17828 states and 28427 transitions. [2021-08-06 19:36:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 22 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 17828 states and 28427 transitions. [2021-08-06 19:36:42,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-06 19:36:42,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:42,555 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:42,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:42,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 19:36:42,755 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1969064741, now seen corresponding path program 136 times [2021-08-06 19:36:42,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:42,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631143989] [2021-08-06 19:36:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:42,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:43,065 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:43,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:43,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:43,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631143989] [2021-08-06 19:36:43,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631143989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:43,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128355313] [2021-08-06 19:36:43,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:36:43,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:43,083 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:43,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 19:36:47,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:36:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:47,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:36:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:48,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128355313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:48,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:48,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-06 19:36:48,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226497467] [2021-08-06 19:36:48,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:48,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:48,383 INFO L87 Difference]: Start difference. First operand 17828 states and 28427 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:48,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:48,978 INFO L93 Difference]: Finished difference Result 18272 states and 29066 transitions. [2021-08-06 19:36:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:36:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-06 19:36:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:49,002 INFO L225 Difference]: With dead ends: 18272 [2021-08-06 19:36:49,002 INFO L226 Difference]: Without dead ends: 18266 [2021-08-06 19:36:49,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:36:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18266 states. [2021-08-06 19:36:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18266 to 17923. [2021-08-06 19:36:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17923 states, 17922 states have (on average 1.594632295502734) internal successors, (28579), 17922 states have internal predecessors, (28579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17923 states to 17923 states and 28579 transitions. [2021-08-06 19:36:49,240 INFO L78 Accepts]: Start accepts. Automaton has 17923 states and 28579 transitions. Word has length 42 [2021-08-06 19:36:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:49,240 INFO L470 AbstractCegarLoop]: Abstraction has 17923 states and 28579 transitions. [2021-08-06 19:36:49,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 17923 states and 28579 transitions. [2021-08-06 19:36:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-06 19:36:49,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:49,253 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:49,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:49,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:49,457 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash 312010051, now seen corresponding path program 9 times [2021-08-06 19:36:49,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:49,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509868365] [2021-08-06 19:36:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:49,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 17 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:49,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:49,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509868365] [2021-08-06 19:36:49,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509868365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:49,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10634513] [2021-08-06 19:36:49,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:36:49,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:49,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:49,567 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:49,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 19:36:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:36:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:54,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:36:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:54,445 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:54,445 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:54,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10634513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:54,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:54,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-08-06 19:36:54,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382406630] [2021-08-06 19:36:54,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:36:54,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:54,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:36:54,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:36:54,470 INFO L87 Difference]: Start difference. First operand 17923 states and 28579 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:54,697 INFO L93 Difference]: Finished difference Result 19148 states and 30385 transitions. [2021-08-06 19:36:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:36:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-06 19:36:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:54,728 INFO L225 Difference]: With dead ends: 19148 [2021-08-06 19:36:54,728 INFO L226 Difference]: Without dead ends: 19148 [2021-08-06 19:36:54,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:36:54,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19148 states. [2021-08-06 19:36:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19148 to 17902. [2021-08-06 19:36:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17902 states, 17901 states have (on average 1.5937098486118093) internal successors, (28529), 17901 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17902 states to 17902 states and 28529 transitions. [2021-08-06 19:36:55,026 INFO L78 Accepts]: Start accepts. Automaton has 17902 states and 28529 transitions. Word has length 43 [2021-08-06 19:36:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:55,026 INFO L470 AbstractCegarLoop]: Abstraction has 17902 states and 28529 transitions. [2021-08-06 19:36:55,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:55,027 INFO L276 IsEmpty]: Start isEmpty. Operand 17902 states and 28529 transitions. [2021-08-06 19:36:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:36:55,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:55,042 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:55,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2021-08-06 19:36:55,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:55,243 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:55,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1664887396, now seen corresponding path program 137 times [2021-08-06 19:36:55,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:55,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143909956] [2021-08-06 19:36:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:55,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:55,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:55,546 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:36:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:55,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:55,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143909956] [2021-08-06 19:36:55,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143909956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:55,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637806665] [2021-08-06 19:36:55,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:55,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:55,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:55,568 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:55,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 19:37:00,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:37:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637806665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:01,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:01,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-08-06 19:37:01,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253490299] [2021-08-06 19:37:01,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:01,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:01,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:01,205 INFO L87 Difference]: Start difference. First operand 17902 states and 28529 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:02,164 INFO L93 Difference]: Finished difference Result 19914 states and 31691 transitions. [2021-08-06 19:37:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:37:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:02,190 INFO L225 Difference]: With dead ends: 19914 [2021-08-06 19:37:02,191 INFO L226 Difference]: Without dead ends: 19892 [2021-08-06 19:37:02,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 740.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:37:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19892 states. [2021-08-06 19:37:02,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19892 to 19111. [2021-08-06 19:37:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19111 states, 19110 states have (on average 1.6056514913657771) internal successors, (30684), 19110 states have internal predecessors, (30684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19111 states to 19111 states and 30684 transitions. [2021-08-06 19:37:02,421 INFO L78 Accepts]: Start accepts. Automaton has 19111 states and 30684 transitions. Word has length 44 [2021-08-06 19:37:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:02,421 INFO L470 AbstractCegarLoop]: Abstraction has 19111 states and 30684 transitions. [2021-08-06 19:37:02,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 29 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:02,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19111 states and 30684 transitions. [2021-08-06 19:37:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:02,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:02,436 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:02,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:02,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 19:37:02,637 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash 972366310, now seen corresponding path program 138 times [2021-08-06 19:37:02,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:02,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559097972] [2021-08-06 19:37:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:02,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:02,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:02,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:02,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:02,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:02,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559097972] [2021-08-06 19:37:02,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559097972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:02,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516044987] [2021-08-06 19:37:02,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:37:02,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:02,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:02,939 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:02,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 19:37:07,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:37:07,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:08,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516044987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:08,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:08,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-06 19:37:08,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596180322] [2021-08-06 19:37:08,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:37:08,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:37:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:37:08,482 INFO L87 Difference]: Start difference. First operand 19111 states and 30684 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:09,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:09,335 INFO L93 Difference]: Finished difference Result 19692 states and 31571 transitions. [2021-08-06 19:37:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:37:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:09,361 INFO L225 Difference]: With dead ends: 19692 [2021-08-06 19:37:09,361 INFO L226 Difference]: Without dead ends: 19674 [2021-08-06 19:37:09,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 717.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:37:09,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19674 states. [2021-08-06 19:37:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19674 to 19464. [2021-08-06 19:37:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19464 states, 19463 states have (on average 1.6086934182808406) internal successors, (31310), 19463 states have internal predecessors, (31310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19464 states to 19464 states and 31310 transitions. [2021-08-06 19:37:09,583 INFO L78 Accepts]: Start accepts. Automaton has 19464 states and 31310 transitions. Word has length 44 [2021-08-06 19:37:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:09,583 INFO L470 AbstractCegarLoop]: Abstraction has 19464 states and 31310 transitions. [2021-08-06 19:37:09,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19464 states and 31310 transitions. [2021-08-06 19:37:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:09,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:09,597 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:09,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2021-08-06 19:37:09,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:09,798 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 794073556, now seen corresponding path program 139 times [2021-08-06 19:37:09,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:09,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773341569] [2021-08-06 19:37:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:09,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:10,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:10,081 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:10,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:10,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773341569] [2021-08-06 19:37:10,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773341569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:10,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314519494] [2021-08-06 19:37:10,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:10,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:10,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:10,102 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:10,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 19:37:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:14,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:14,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314519494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:15,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:15,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-08-06 19:37:15,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822733162] [2021-08-06 19:37:15,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:37:15,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:15,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:37:15,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:37:15,790 INFO L87 Difference]: Start difference. First operand 19464 states and 31310 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:16,717 INFO L93 Difference]: Finished difference Result 19670 states and 31606 transitions. [2021-08-06 19:37:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:37:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:16,743 INFO L225 Difference]: With dead ends: 19670 [2021-08-06 19:37:16,744 INFO L226 Difference]: Without dead ends: 19652 [2021-08-06 19:37:16,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 819.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 19:37:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19652 states. [2021-08-06 19:37:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19652 to 19566. [2021-08-06 19:37:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19566 states, 19565 states have (on average 1.60950677229747) internal successors, (31490), 19565 states have internal predecessors, (31490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19566 states to 19566 states and 31490 transitions. [2021-08-06 19:37:17,016 INFO L78 Accepts]: Start accepts. Automaton has 19566 states and 31490 transitions. Word has length 44 [2021-08-06 19:37:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:17,016 INFO L470 AbstractCegarLoop]: Abstraction has 19566 states and 31490 transitions. [2021-08-06 19:37:17,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 19566 states and 31490 transitions. [2021-08-06 19:37:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:17,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:17,031 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:17,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 19:37:17,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:17,232 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:17,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1397573930, now seen corresponding path program 140 times [2021-08-06 19:37:17,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:17,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494259547] [2021-08-06 19:37:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:17,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:17,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:17,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:17,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:17,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494259547] [2021-08-06 19:37:17,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494259547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:17,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937721925] [2021-08-06 19:37:17,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:17,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:17,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:17,573 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:17,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 19:37:22,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:22,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:22,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:22,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:23,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937721925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:23,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:23,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-06 19:37:23,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403645398] [2021-08-06 19:37:23,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:23,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:23,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:23,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:23,315 INFO L87 Difference]: Start difference. First operand 19566 states and 31490 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:24,507 INFO L93 Difference]: Finished difference Result 21372 states and 34295 transitions. [2021-08-06 19:37:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:37:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:24,536 INFO L225 Difference]: With dead ends: 21372 [2021-08-06 19:37:24,536 INFO L226 Difference]: Without dead ends: 21350 [2021-08-06 19:37:24,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:37:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21350 states. [2021-08-06 19:37:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21350 to 19939. [2021-08-06 19:37:24,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19939 states, 19938 states have (on average 1.6125990570769384) internal successors, (32152), 19938 states have internal predecessors, (32152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19939 states to 19939 states and 32152 transitions. [2021-08-06 19:37:24,850 INFO L78 Accepts]: Start accepts. Automaton has 19939 states and 32152 transitions. Word has length 44 [2021-08-06 19:37:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:24,850 INFO L470 AbstractCegarLoop]: Abstraction has 19939 states and 32152 transitions. [2021-08-06 19:37:24,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 19939 states and 32152 transitions. [2021-08-06 19:37:24,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:24,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:24,867 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:24,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:25,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:25,076 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2145783002, now seen corresponding path program 141 times [2021-08-06 19:37:25,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:25,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901908120] [2021-08-06 19:37:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:25,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:25,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:25,360 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:25,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:25,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901908120] [2021-08-06 19:37:25,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901908120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:25,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867569007] [2021-08-06 19:37:25,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:25,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:25,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:25,381 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:25,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 19:37:30,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:37:30,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:30,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:30,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:31,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867569007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:31,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:31,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-08-06 19:37:31,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729002243] [2021-08-06 19:37:31,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:37:31,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:37:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:37:31,213 INFO L87 Difference]: Start difference. First operand 19939 states and 32152 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:32,727 INFO L93 Difference]: Finished difference Result 21449 states and 34477 transitions. [2021-08-06 19:37:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 19:37:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:32,757 INFO L225 Difference]: With dead ends: 21449 [2021-08-06 19:37:32,758 INFO L226 Difference]: Without dead ends: 21437 [2021-08-06 19:37:32,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 921.6ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 19:37:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21437 states. [2021-08-06 19:37:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21437 to 20336. [2021-08-06 19:37:32,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20336 states, 20335 states have (on average 1.6176542906319153) internal successors, (32895), 20335 states have internal predecessors, (32895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20336 states to 20336 states and 32895 transitions. [2021-08-06 19:37:33,024 INFO L78 Accepts]: Start accepts. Automaton has 20336 states and 32895 transitions. Word has length 44 [2021-08-06 19:37:33,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:33,024 INFO L470 AbstractCegarLoop]: Abstraction has 20336 states and 32895 transitions. [2021-08-06 19:37:33,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:33,024 INFO L276 IsEmpty]: Start isEmpty. Operand 20336 states and 32895 transitions. [2021-08-06 19:37:33,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:33,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:33,040 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:33,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 19:37:33,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:33,241 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1542282628, now seen corresponding path program 142 times [2021-08-06 19:37:33,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:33,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894051327] [2021-08-06 19:37:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:33,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:33,607 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:33,608 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:33,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:33,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894051327] [2021-08-06 19:37:33,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894051327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:33,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645401890] [2021-08-06 19:37:33,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:37:33,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:33,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:33,629 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:33,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 19:37:38,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:37:38,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:38,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:39,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645401890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:39,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:39,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-06 19:37:39,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970831753] [2021-08-06 19:37:39,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:39,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:39,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:39,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:39,456 INFO L87 Difference]: Start difference. First operand 20336 states and 32895 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:40,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:40,368 INFO L93 Difference]: Finished difference Result 21225 states and 34242 transitions. [2021-08-06 19:37:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:37:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:40,395 INFO L225 Difference]: With dead ends: 21225 [2021-08-06 19:37:40,395 INFO L226 Difference]: Without dead ends: 21209 [2021-08-06 19:37:40,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 869.7ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:37:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21209 states. [2021-08-06 19:37:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21209 to 20822. [2021-08-06 19:37:40,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20822 states, 20821 states have (on average 1.6203832668940013) internal successors, (33738), 20821 states have internal predecessors, (33738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20822 states to 20822 states and 33738 transitions. [2021-08-06 19:37:40,637 INFO L78 Accepts]: Start accepts. Automaton has 20822 states and 33738 transitions. Word has length 44 [2021-08-06 19:37:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:40,637 INFO L470 AbstractCegarLoop]: Abstraction has 20822 states and 33738 transitions. [2021-08-06 19:37:40,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 20822 states and 33738 transitions. [2021-08-06 19:37:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:40,652 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:40,653 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:40,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 19:37:40,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:40,853 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:40,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:40,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1395741850, now seen corresponding path program 143 times [2021-08-06 19:37:40,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:40,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039656790] [2021-08-06 19:37:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:40,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:41,246 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:41,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:41,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:41,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039656790] [2021-08-06 19:37:41,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039656790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:41,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151792651] [2021-08-06 19:37:41,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:37:41,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:41,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:41,268 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:41,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 19:37:46,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:37:46,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:46,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:47,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151792651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:47,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:47,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-08-06 19:37:47,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969845171] [2021-08-06 19:37:47,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:37:47,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:47,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:37:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:47,120 INFO L87 Difference]: Start difference. First operand 20822 states and 33738 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:48,276 INFO L93 Difference]: Finished difference Result 21802 states and 35223 transitions. [2021-08-06 19:37:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:37:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:48,302 INFO L225 Difference]: With dead ends: 21802 [2021-08-06 19:37:48,302 INFO L226 Difference]: Without dead ends: 21786 [2021-08-06 19:37:48,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 858.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:37:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21786 states. [2021-08-06 19:37:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21786 to 21359. [2021-08-06 19:37:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21359 states, 21358 states have (on average 1.6237475419046727) internal successors, (34680), 21358 states have internal predecessors, (34680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21359 states to 21359 states and 34680 transitions. [2021-08-06 19:37:48,556 INFO L78 Accepts]: Start accepts. Automaton has 21359 states and 34680 transitions. Word has length 44 [2021-08-06 19:37:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:48,556 INFO L470 AbstractCegarLoop]: Abstraction has 21359 states and 34680 transitions. [2021-08-06 19:37:48,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 21359 states and 34680 transitions. [2021-08-06 19:37:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:48,572 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:48,572 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:48,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-06 19:37:48,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 19:37:48,773 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:48,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1985715676, now seen corresponding path program 144 times [2021-08-06 19:37:48,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:48,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196366270] [2021-08-06 19:37:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:48,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:49,020 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:49,021 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:49,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:49,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196366270] [2021-08-06 19:37:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196366270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:49,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693062495] [2021-08-06 19:37:49,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:37:49,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:49,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:49,043 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:49,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 19:37:54,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:37:54,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:37:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:55,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693062495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:55,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:55,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-08-06 19:37:55,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459725766] [2021-08-06 19:37:55,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-06 19:37:55,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-06 19:37:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:37:55,086 INFO L87 Difference]: Start difference. First operand 21359 states and 34680 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:56,714 INFO L93 Difference]: Finished difference Result 22674 states and 36662 transitions. [2021-08-06 19:37:56,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 19:37:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:37:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:56,781 INFO L225 Difference]: With dead ends: 22674 [2021-08-06 19:37:56,781 INFO L226 Difference]: Without dead ends: 22662 [2021-08-06 19:37:56,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1247.5ms TimeCoverageRelationStatistics Valid=243, Invalid=3179, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 19:37:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22662 states. [2021-08-06 19:37:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22662 to 21572. [2021-08-06 19:37:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21572 states, 21571 states have (on average 1.6248203606694174) internal successors, (35049), 21571 states have internal predecessors, (35049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21572 states to 21572 states and 35049 transitions. [2021-08-06 19:37:57,008 INFO L78 Accepts]: Start accepts. Automaton has 21572 states and 35049 transitions. Word has length 44 [2021-08-06 19:37:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:57,008 INFO L470 AbstractCegarLoop]: Abstraction has 21572 states and 35049 transitions. [2021-08-06 19:37:57,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21572 states and 35049 transitions. [2021-08-06 19:37:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:37:57,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:57,025 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:57,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 19:37:57,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:57,225 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:57,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:57,226 INFO L82 PathProgramCache]: Analyzing trace with hash 477869400, now seen corresponding path program 145 times [2021-08-06 19:37:57,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:57,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384481569] [2021-08-06 19:37:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:57,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:57,463 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:57,464 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:37:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:57,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:57,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384481569] [2021-08-06 19:37:57,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384481569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:57,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608690602] [2021-08-06 19:37:57,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:57,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:57,484 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:57,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 19:38:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:02,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:03,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608690602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:03,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:03,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:38:03,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533387736] [2021-08-06 19:38:03,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:38:03,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:38:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:38:03,362 INFO L87 Difference]: Start difference. First operand 21572 states and 35049 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:04,232 INFO L93 Difference]: Finished difference Result 21691 states and 35218 transitions. [2021-08-06 19:38:04,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:38:04,232 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:04,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:04,265 INFO L225 Difference]: With dead ends: 21691 [2021-08-06 19:38:04,265 INFO L226 Difference]: Without dead ends: 21685 [2021-08-06 19:38:04,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:38:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21685 states. [2021-08-06 19:38:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21685 to 21619. [2021-08-06 19:38:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21619 states, 21618 states have (on average 1.6251272088074753) internal successors, (35132), 21618 states have internal predecessors, (35132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21619 states to 21619 states and 35132 transitions. [2021-08-06 19:38:04,530 INFO L78 Accepts]: Start accepts. Automaton has 21619 states and 35132 transitions. Word has length 44 [2021-08-06 19:38:04,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:04,530 INFO L470 AbstractCegarLoop]: Abstraction has 21619 states and 35132 transitions. [2021-08-06 19:38:04,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 21619 states and 35132 transitions. [2021-08-06 19:38:04,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:04,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:04,546 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:04,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 19:38:04,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 19:38:04,747 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:04,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2008614738, now seen corresponding path program 146 times [2021-08-06 19:38:04,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:04,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832392672] [2021-08-06 19:38:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:04,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:04,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:04,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:05,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:05,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832392672] [2021-08-06 19:38:05,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832392672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:05,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029018421] [2021-08-06 19:38:05,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:05,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:05,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:05,003 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:05,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 19:38:10,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:10,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029018421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:10,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:10,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:38:10,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676750116] [2021-08-06 19:38:10,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:38:10,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:38:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:38:10,830 INFO L87 Difference]: Start difference. First operand 21619 states and 35132 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:11,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:11,756 INFO L93 Difference]: Finished difference Result 21766 states and 35341 transitions. [2021-08-06 19:38:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:38:11,756 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:11,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:11,793 INFO L225 Difference]: With dead ends: 21766 [2021-08-06 19:38:11,793 INFO L226 Difference]: Without dead ends: 21760 [2021-08-06 19:38:11,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:38:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21760 states. [2021-08-06 19:38:12,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21760 to 21666. [2021-08-06 19:38:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21666 states, 21665 states have (on average 1.6254327255942764) internal successors, (35215), 21665 states have internal predecessors, (35215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:12,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21666 states to 21666 states and 35215 transitions. [2021-08-06 19:38:12,134 INFO L78 Accepts]: Start accepts. Automaton has 21666 states and 35215 transitions. Word has length 44 [2021-08-06 19:38:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:12,134 INFO L470 AbstractCegarLoop]: Abstraction has 21666 states and 35215 transitions. [2021-08-06 19:38:12,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:12,134 INFO L276 IsEmpty]: Start isEmpty. Operand 21666 states and 35215 transitions. [2021-08-06 19:38:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:12,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:12,152 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:12,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 19:38:12,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 19:38:12,352 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash 346318104, now seen corresponding path program 147 times [2021-08-06 19:38:12,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:12,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682084113] [2021-08-06 19:38:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:12,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:12,615 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:12,616 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:12,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:12,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682084113] [2021-08-06 19:38:12,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682084113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:12,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438211442] [2021-08-06 19:38:12,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:12,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:12,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:12,641 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:12,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 19:38:17,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:38:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:17,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:17,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:18,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438211442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:18,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:18,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:38:18,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883074957] [2021-08-06 19:38:18,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:38:18,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:38:18,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:38:18,552 INFO L87 Difference]: Start difference. First operand 21666 states and 35215 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:19,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:19,415 INFO L93 Difference]: Finished difference Result 21823 states and 35441 transitions. [2021-08-06 19:38:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:38:19,416 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:19,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:19,444 INFO L225 Difference]: With dead ends: 21823 [2021-08-06 19:38:19,444 INFO L226 Difference]: Without dead ends: 21817 [2021-08-06 19:38:19,445 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 639.8ms TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:38:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2021-08-06 19:38:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 21712. [2021-08-06 19:38:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21712 states, 21711 states have (on average 1.6257196812675603) internal successors, (35296), 21711 states have internal predecessors, (35296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21712 states to 21712 states and 35296 transitions. [2021-08-06 19:38:19,775 INFO L78 Accepts]: Start accepts. Automaton has 21712 states and 35296 transitions. Word has length 44 [2021-08-06 19:38:19,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:19,775 INFO L470 AbstractCegarLoop]: Abstraction has 21712 states and 35296 transitions. [2021-08-06 19:38:19,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 21712 states and 35296 transitions. [2021-08-06 19:38:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:19,791 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:19,791 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:19,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-06 19:38:19,992 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -39690002, now seen corresponding path program 148 times [2021-08-06 19:38:19,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:19,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209113833] [2021-08-06 19:38:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:19,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:20,223 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:20,224 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:20,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:20,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209113833] [2021-08-06 19:38:20,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209113833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:20,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622700604] [2021-08-06 19:38:20,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:20,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:20,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:20,245 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:20,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 19:38:25,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:25,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:25,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:26,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622700604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:26,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:26,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:38:26,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666455141] [2021-08-06 19:38:26,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:38:26,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:26,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:38:26,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:38:26,181 INFO L87 Difference]: Start difference. First operand 21712 states and 35296 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:27,295 INFO L93 Difference]: Finished difference Result 22845 states and 37062 transitions. [2021-08-06 19:38:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:38:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:27,331 INFO L225 Difference]: With dead ends: 22845 [2021-08-06 19:38:27,331 INFO L226 Difference]: Without dead ends: 22833 [2021-08-06 19:38:27,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 810.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:38:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22833 states. [2021-08-06 19:38:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22833 to 21879. [2021-08-06 19:38:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21879 states, 21878 states have (on average 1.626839747691745) internal successors, (35592), 21878 states have internal predecessors, (35592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21879 states to 21879 states and 35592 transitions. [2021-08-06 19:38:27,590 INFO L78 Accepts]: Start accepts. Automaton has 21879 states and 35592 transitions. Word has length 44 [2021-08-06 19:38:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:27,590 INFO L470 AbstractCegarLoop]: Abstraction has 21879 states and 35592 transitions. [2021-08-06 19:38:27,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21879 states and 35592 transitions. [2021-08-06 19:38:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:27,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:27,606 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:27,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 19:38:27,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:27,806 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash -819915744, now seen corresponding path program 149 times [2021-08-06 19:38:27,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:27,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136492657] [2021-08-06 19:38:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:27,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:28,044 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:28,045 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:28,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136492657] [2021-08-06 19:38:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136492657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896039473] [2021-08-06 19:38:28,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:28,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:28,066 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:28,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 19:38:33,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:38:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:33,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:34,161 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:34,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896039473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:34,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:34,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-08-06 19:38:34,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060847786] [2021-08-06 19:38:34,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:38:34,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:38:34,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:38:34,162 INFO L87 Difference]: Start difference. First operand 21879 states and 35592 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:34,697 INFO L93 Difference]: Finished difference Result 22062 states and 35870 transitions. [2021-08-06 19:38:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:38:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:34,726 INFO L225 Difference]: With dead ends: 22062 [2021-08-06 19:38:34,727 INFO L226 Difference]: Without dead ends: 22050 [2021-08-06 19:38:34,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:38:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22050 states. [2021-08-06 19:38:34,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22050 to 21974. [2021-08-06 19:38:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21974 states, 21973 states have (on average 1.6274973831520503) internal successors, (35761), 21973 states have internal predecessors, (35761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:34,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21974 states to 21974 states and 35761 transitions. [2021-08-06 19:38:34,987 INFO L78 Accepts]: Start accepts. Automaton has 21974 states and 35761 transitions. Word has length 44 [2021-08-06 19:38:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:34,987 INFO L470 AbstractCegarLoop]: Abstraction has 21974 states and 35761 transitions. [2021-08-06 19:38:34,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21974 states and 35761 transitions. [2021-08-06 19:38:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:35,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:35,004 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:35,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-06 19:38:35,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:35,204 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:35,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:35,205 INFO L82 PathProgramCache]: Analyzing trace with hash -216415370, now seen corresponding path program 150 times [2021-08-06 19:38:35,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:35,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323179390] [2021-08-06 19:38:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:35,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:35,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:35,460 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:35,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:35,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323179390] [2021-08-06 19:38:35,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323179390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:35,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214694740] [2021-08-06 19:38:35,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:35,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:35,481 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:35,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 19:38:40,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:38:40,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:40,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:40,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:41,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214694740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:41,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:41,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-08-06 19:38:41,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713511407] [2021-08-06 19:38:41,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:38:41,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:38:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:38:41,695 INFO L87 Difference]: Start difference. First operand 21974 states and 35761 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:42,236 INFO L93 Difference]: Finished difference Result 22168 states and 36052 transitions. [2021-08-06 19:38:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:38:42,237 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:42,269 INFO L225 Difference]: With dead ends: 22168 [2021-08-06 19:38:42,269 INFO L226 Difference]: Without dead ends: 22156 [2021-08-06 19:38:42,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:38:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22156 states. [2021-08-06 19:38:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22156 to 22071. [2021-08-06 19:38:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22071 states, 22070 states have (on average 1.6281830539193476) internal successors, (35934), 22070 states have internal predecessors, (35934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22071 states to 22071 states and 35934 transitions. [2021-08-06 19:38:42,544 INFO L78 Accepts]: Start accepts. Automaton has 22071 states and 35934 transitions. Word has length 44 [2021-08-06 19:38:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 22071 states and 35934 transitions. [2021-08-06 19:38:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 22071 states and 35934 transitions. [2021-08-06 19:38:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:42,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:42,561 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:42,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:42,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:42,761 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash 404833248, now seen corresponding path program 151 times [2021-08-06 19:38:42,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:42,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580012467] [2021-08-06 19:38:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:42,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:43,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:43,017 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:43,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:43,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580012467] [2021-08-06 19:38:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580012467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:43,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316534622] [2021-08-06 19:38:43,040 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:43,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:43,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:43,045 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:43,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 19:38:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:48,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:48,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:49,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316534622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:49,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:49,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-06 19:38:49,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021848382] [2021-08-06 19:38:49,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:38:49,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:38:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:38:49,340 INFO L87 Difference]: Start difference. First operand 22071 states and 35934 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 19:38:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:50,026 INFO L93 Difference]: Finished difference Result 24363 states and 39504 transitions. [2021-08-06 19:38:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:38:50,027 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 44 [2021-08-06 19:38:50,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:50,062 INFO L225 Difference]: With dead ends: 24363 [2021-08-06 19:38:50,062 INFO L226 Difference]: Without dead ends: 24345 [2021-08-06 19:38:50,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:38:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24345 states. [2021-08-06 19:38:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24345 to 22989. [2021-08-06 19:38:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22989 states, 22988 states have (on average 1.6339829476248477) internal successors, (37562), 22988 states have internal predecessors, (37562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:50,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22989 states to 22989 states and 37562 transitions. [2021-08-06 19:38:50,342 INFO L78 Accepts]: Start accepts. Automaton has 22989 states and 37562 transitions. Word has length 44 [2021-08-06 19:38:50,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:50,342 INFO L470 AbstractCegarLoop]: Abstraction has 22989 states and 37562 transitions. [2021-08-06 19:38:50,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 19:38:50,342 INFO L276 IsEmpty]: Start isEmpty. Operand 22989 states and 37562 transitions. [2021-08-06 19:38:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:50,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:50,359 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:50,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:50,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:50,560 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1459546004, now seen corresponding path program 152 times [2021-08-06 19:38:50,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:50,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392694080] [2021-08-06 19:38:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:50,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:50,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:50,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:50,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:50,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392694080] [2021-08-06 19:38:50,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392694080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:50,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589263178] [2021-08-06 19:38:50,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:50,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:50,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:50,819 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:50,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 19:38:56,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:56,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:56,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:38:56,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:57,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589263178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:57,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:57,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:38:57,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620842595] [2021-08-06 19:38:57,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:38:57,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:57,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:38:57,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:38:57,010 INFO L87 Difference]: Start difference. First operand 22989 states and 37562 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:58,045 INFO L93 Difference]: Finished difference Result 23683 states and 38606 transitions. [2021-08-06 19:38:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:38:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:38:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:58,072 INFO L225 Difference]: With dead ends: 23683 [2021-08-06 19:38:58,072 INFO L226 Difference]: Without dead ends: 23677 [2021-08-06 19:38:58,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:38:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23677 states. [2021-08-06 19:38:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23677 to 23030. [2021-08-06 19:38:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23030 states, 23029 states have (on average 1.6343306266012418) internal successors, (37637), 23029 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23030 states to 23030 states and 37637 transitions. [2021-08-06 19:38:58,326 INFO L78 Accepts]: Start accepts. Automaton has 23030 states and 37637 transitions. Word has length 44 [2021-08-06 19:38:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:58,326 INFO L470 AbstractCegarLoop]: Abstraction has 23030 states and 37637 transitions. [2021-08-06 19:38:58,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 23030 states and 37637 transitions. [2021-08-06 19:38:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:38:58,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:58,344 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:58,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:58,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:58,544 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 41200234, now seen corresponding path program 153 times [2021-08-06 19:38:58,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:58,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710367769] [2021-08-06 19:38:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:58,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:58,776 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:58,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:38:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:58,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:58,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710367769] [2021-08-06 19:38:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710367769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:58,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845897302] [2021-08-06 19:38:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:58,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:58,797 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:58,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 19:39:04,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:39:04,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:39:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845897302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:05,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:05,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:39:05,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780335046] [2021-08-06 19:39:05,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:39:05,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:39:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:39:05,025 INFO L87 Difference]: Start difference. First operand 23030 states and 37637 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:05,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:05,833 INFO L93 Difference]: Finished difference Result 23165 states and 37829 transitions. [2021-08-06 19:39:05,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:39:05,833 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:39:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:05,864 INFO L225 Difference]: With dead ends: 23165 [2021-08-06 19:39:05,864 INFO L226 Difference]: Without dead ends: 23159 [2021-08-06 19:39:05,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 642.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:39:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23159 states. [2021-08-06 19:39:06,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23159 to 23077. [2021-08-06 19:39:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23077 states, 23076 states have (on average 1.6345987172820247) internal successors, (37720), 23076 states have internal predecessors, (37720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23077 states to 23077 states and 37720 transitions. [2021-08-06 19:39:06,152 INFO L78 Accepts]: Start accepts. Automaton has 23077 states and 37720 transitions. Word has length 44 [2021-08-06 19:39:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:06,152 INFO L470 AbstractCegarLoop]: Abstraction has 23077 states and 37720 transitions. [2021-08-06 19:39:06,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:06,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23077 states and 37720 transitions. [2021-08-06 19:39:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:39:06,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:06,235 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:06,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:06,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:06,437 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:06,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:06,437 INFO L82 PathProgramCache]: Analyzing trace with hash 721261746, now seen corresponding path program 154 times [2021-08-06 19:39:06,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:06,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677757738] [2021-08-06 19:39:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:06,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:06,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:06,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:06,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:06,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677757738] [2021-08-06 19:39:06,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677757738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:06,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984788972] [2021-08-06 19:39:06,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:39:06,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:06,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:06,690 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:06,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 19:39:12,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:39:12,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:39:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:12,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984788972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:12,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:12,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:39:12,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666877416] [2021-08-06 19:39:12,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:39:12,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:12,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:39:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:39:12,930 INFO L87 Difference]: Start difference. First operand 23077 states and 37720 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:13,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:13,762 INFO L93 Difference]: Finished difference Result 23218 states and 37921 transitions. [2021-08-06 19:39:13,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:39:13,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:39:13,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:13,791 INFO L225 Difference]: With dead ends: 23218 [2021-08-06 19:39:13,791 INFO L226 Difference]: Without dead ends: 23212 [2021-08-06 19:39:13,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:39:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23212 states. [2021-08-06 19:39:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23212 to 23121. [2021-08-06 19:39:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23121 states, 23120 states have (on average 1.6349048442906575) internal successors, (37799), 23120 states have internal predecessors, (37799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23121 states to 23121 states and 37799 transitions. [2021-08-06 19:39:14,078 INFO L78 Accepts]: Start accepts. Automaton has 23121 states and 37799 transitions. Word has length 44 [2021-08-06 19:39:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:14,078 INFO L470 AbstractCegarLoop]: Abstraction has 23121 states and 37799 transitions. [2021-08-06 19:39:14,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 23121 states and 37799 transitions. [2021-08-06 19:39:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:39:14,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:14,096 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:14,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-06 19:39:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 19:39:14,297 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:14,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1022454484, now seen corresponding path program 155 times [2021-08-06 19:39:14,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:14,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110899573] [2021-08-06 19:39:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:14,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:14,549 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:14,550 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:14,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:14,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110899573] [2021-08-06 19:39:14,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110899573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:14,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93980652] [2021-08-06 19:39:14,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:14,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:14,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:14,571 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:14,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 19:39:20,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:39:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:20,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:39:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:20,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93980652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:20,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:20,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2021-08-06 19:39:20,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835410360] [2021-08-06 19:39:20,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:39:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:39:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:39:20,944 INFO L87 Difference]: Start difference. First operand 23121 states and 37799 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:21,822 INFO L93 Difference]: Finished difference Result 23263 states and 38000 transitions. [2021-08-06 19:39:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:39:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:39:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:21,852 INFO L225 Difference]: With dead ends: 23263 [2021-08-06 19:39:21,853 INFO L226 Difference]: Without dead ends: 23257 [2021-08-06 19:39:21,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:39:21,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23257 states. [2021-08-06 19:39:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23257 to 23165. [2021-08-06 19:39:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23165 states, 23164 states have (on average 1.6352098083232602) internal successors, (37878), 23164 states have internal predecessors, (37878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23165 states to 23165 states and 37878 transitions. [2021-08-06 19:39:22,145 INFO L78 Accepts]: Start accepts. Automaton has 23165 states and 37878 transitions. Word has length 44 [2021-08-06 19:39:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 23165 states and 37878 transitions. [2021-08-06 19:39:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 26 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 23165 states and 37878 transitions. [2021-08-06 19:39:22,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:39:22,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:22,162 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:22,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:22,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 19:39:22,363 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:22,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:22,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1292409948, now seen corresponding path program 156 times [2021-08-06 19:39:22,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:22,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18153860] [2021-08-06 19:39:22,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:22,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:22,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:22,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:22,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:22,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18153860] [2021-08-06 19:39:22,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18153860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:22,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761698727] [2021-08-06 19:39:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:39:22,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:22,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:22,879 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:22,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 19:39:28,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:39:28,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:28,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 19:39:28,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:29,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761698727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:29,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:29,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-08-06 19:39:29,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353294924] [2021-08-06 19:39:29,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:39:29,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:29,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:39:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:39:29,104 INFO L87 Difference]: Start difference. First operand 23165 states and 37878 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:29,946 INFO L93 Difference]: Finished difference Result 23272 states and 38033 transitions. [2021-08-06 19:39:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:39:29,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-06 19:39:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:29,974 INFO L225 Difference]: With dead ends: 23272 [2021-08-06 19:39:29,974 INFO L226 Difference]: Without dead ends: 23266 [2021-08-06 19:39:29,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 735.0ms TimeCoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:39:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23266 states. [2021-08-06 19:39:30,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23266 to 23203. [2021-08-06 19:39:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23203 states, 23202 states have (on average 1.6355486595983104) internal successors, (37948), 23202 states have internal predecessors, (37948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23203 states to 23203 states and 37948 transitions. [2021-08-06 19:39:30,300 INFO L78 Accepts]: Start accepts. Automaton has 23203 states and 37948 transitions. Word has length 44 [2021-08-06 19:39:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:30,300 INFO L470 AbstractCegarLoop]: Abstraction has 23203 states and 37948 transitions. [2021-08-06 19:39:30,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 23203 states and 37948 transitions. [2021-08-06 19:39:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 19:39:30,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:30,317 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:30,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:30,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-06 19:39:30,518 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:30,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1194074190, now seen corresponding path program 157 times [2021-08-06 19:39:30,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:30,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82490507] [2021-08-06 19:39:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:30,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:30,981 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:30,982 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 56.3 percent of original size [2021-08-06 19:39:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:31,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:31,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82490507] [2021-08-06 19:39:31,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82490507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:31,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678835011] [2021-08-06 19:39:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:39:31,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:31,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:31,009 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:31,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 19:39:32,635 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:39:32,667 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:39:33,638 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:39:33,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-06 19:39:33,689 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 [2021-08-06 19:39:33,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 19:39:33,839 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 45 with TraceHistMax 6,while executing Executor. [2021-08-06 19:39:33,840 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:39:33,840 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:39:33,844 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:39:33,844 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:39:33,845 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:39:33 BasicIcfg [2021-08-06 19:39:33,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:39:33,846 INFO L168 Benchmark]: Toolchain (without parser) took 712152.45 ms. Allocated memory was 203.4 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 184.3 MB in the beginning and 3.1 GB in the end (delta: -2.9 GB). Peak memory consumption was 746.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:33,846 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 203.4 MB. Free memory is still 185.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:39:33,846 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.20 ms. Allocated memory is still 203.4 MB. Free memory was 184.2 MB in the beginning and 182.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:33,846 INFO L168 Benchmark]: Boogie Preprocessor took 18.53 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 181.8 MB in the end (delta: 923.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:39:33,846 INFO L168 Benchmark]: RCFGBuilder took 278.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 170.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:33,846 INFO L168 Benchmark]: TraceAbstraction took 711820.42 ms. Allocated memory was 203.4 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 170.3 MB in the beginning and 3.1 GB in the end (delta: -2.9 GB). Peak memory consumption was 731.4 MB. Max. memory is 8.0 GB. [2021-08-06 19:39:33,847 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 203.4 MB. Free memory is still 185.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.20 ms. Allocated memory is still 203.4 MB. Free memory was 184.2 MB in the beginning and 182.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.53 ms. Allocated memory is still 203.4 MB. Free memory was 182.7 MB in the beginning and 181.8 MB in the end (delta: 923.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 278.62 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 170.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 711820.42 ms. Allocated memory was 203.4 MB in the beginning and 3.6 GB in the end (delta: 3.4 GB). Free memory was 170.3 MB in the beginning and 3.1 GB in the end (delta: -2.9 GB). Peak memory consumption was 731.4 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: 71, positive: 59, positive conditional: 59, positive unconditional: 0, negative: 12, negative conditional: 12, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 59, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 59, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 59, positive: 59, positive conditional: 0, positive unconditional: 59, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 59, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 59, unknown conditional: 0, unknown unconditional: 59] , Statistics on independence cache: Total cache size (in pairs): 59, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 12 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 45 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 45 with TraceHistMax 6,while executing Executor. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 45 with TraceHistMax 6,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 39 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 711722.8ms, OverallIterations: 170, TraceHistogramMax: 6, EmptinessCheckTime: 1198.5ms, AutomataDifference: 126407.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 82.6ms, PartialOrderReductionTime: 70.8ms, HoareTripleCheckerStatistics: 9023 SDtfs, 19968 SDslu, 99159 SDs, 0 SdLazy, 145709 SolverSat, 4036 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54466.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10083 GetRequests, 4499 SyntacticMatches, 333 SemanticMatches, 5251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37499 ImplicationChecksByTransitivity, 97818.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23203occurred in iteration=169, InterpolantAutomatonStates: 4197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18609.3ms AutomataMinimizationTime, 169 MinimizatonAttempts, 67449 StatesRemovedByMinimization, 169 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 548.3ms SsaConstructionTime, 2407.9ms SatisfiabilityAnalysisTime, 123012.5ms InterpolantComputationTime, 12104 NumberOfCodeBlocks, 12068 NumberOfCodeBlocksAsserted, 695 NumberOfCheckSat, 11769 ConstructedInterpolants, 0 QuantifiedInterpolants, 146282 SizeOfPredicates, 731 NumberOfNonLiveVariables, 11245 ConjunctsInSsa, 3279 ConjunctsInUnsatCore, 335 InterpolantComputations, 3 PerfectInterpolantSequences, 967/11542 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown