/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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:55:12,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:55:12,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:55:12,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 17:55:12,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:55:12,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:55:12,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:55:12,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:55:12,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:55:12,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:55:12,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:55:12,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:55:12,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:55:12,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:55:12,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:55:12,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:55:12,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 17:55:12,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:55:12,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:55:12,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:55:12,393 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 [2021-08-21 17:55:12,417 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:55:12,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:55:12,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:55:12,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:55:12,421 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:55:12,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:55:12,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:55:12,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:55:12,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:55:12,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:55:12,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:55:12,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:55:12,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:55:12,423 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:55:12,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:55:12,424 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:55:12,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:55:12,424 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:55:12,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:55:12,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:55:12,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:55:12,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:55:12,773 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:55:12,783 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:55:12,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-08-21 17:55:12,784 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-08-21 17:55:12,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:55:12,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:55:12,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:55:12,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:55:12,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:55:12,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,839 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:55:12,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:55:12,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:55:12,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:55:12,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:55:12,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:55:12,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:55:12,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:55:12,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/1) ... [2021-08-21 17:55:12,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:55:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:12,940 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) [2021-08-21 17:55:12,945 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 [2021-08-21 17:55:12,965 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:55:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:55:12,965 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:55:12,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:55:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:55:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:55:12,966 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:55:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:55:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:55:12,967 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:55:13,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:55:13,085 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 17:55:13,086 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:55:13 BoogieIcfgContainer [2021-08-21 17:55:13,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:55:13,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:55:13,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:55:13,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:55:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:55:12" (1/2) ... [2021-08-21 17:55:13,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd10f06 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:55:13, skipping insertion in model container [2021-08-21 17:55:13,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:55:13" (2/2) ... [2021-08-21 17:55:13,091 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-08-21 17:55:13,094 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:55:13,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:55:13,095 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:55:13,095 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:55:13,116 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:55:13,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:55:13,158 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 [2021-08-21 17:55:13,158 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:55:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:55:13,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:13,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:13,245 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:13,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1801174455, now seen corresponding path program 1 times [2021-08-21 17:55:13,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:13,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267220694] [2021-08-21 17:55:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:13,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:13,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:13,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267220694] [2021-08-21 17:55:13,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267220694] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:55:13,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:55:13,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 17:55:13,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843576522] [2021-08-21 17:55:13,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 17:55:13,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:13,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 17:55:13,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:55:13,465 INFO L87 Difference]: Start difference. First operand has 85 states, 69 states have (on average 1.5072463768115942) internal successors, (104), 84 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:13,498 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2021-08-21 17:55:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 17:55:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:55:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:13,508 INFO L225 Difference]: With dead ends: 134 [2021-08-21 17:55:13,508 INFO L226 Difference]: Without dead ends: 90 [2021-08-21 17:55:13,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 17:55:13,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-21 17:55:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-08-21 17:55:13,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 65 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2021-08-21 17:55:13,549 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 11 [2021-08-21 17:55:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:13,550 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2021-08-21 17:55:13,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2021-08-21 17:55:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:55:13,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:13,552 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:55:13,552 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:13,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1253243551, now seen corresponding path program 1 times [2021-08-21 17:55:13,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:13,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096729224] [2021-08-21 17:55:13,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:13,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:13,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:13,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096729224] [2021-08-21 17:55:13,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096729224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:13,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116163749] [2021-08-21 17:55:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:13,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:13,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:13,624 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) [2021-08-21 17:55:13,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 17:55:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:13,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:55:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:13,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116163749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:13,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:13,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 17:55:13,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427596750] [2021-08-21 17:55:13,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:55:13,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:55:13,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:13,795 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:13,838 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2021-08-21 17:55:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:55:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:55:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:13,839 INFO L225 Difference]: With dead ends: 114 [2021-08-21 17:55:13,839 INFO L226 Difference]: Without dead ends: 114 [2021-08-21 17:55:13,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-21 17:55:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2021-08-21 17:55:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 69 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2021-08-21 17:55:13,845 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 16 [2021-08-21 17:55:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:13,845 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2021-08-21 17:55:13,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2021-08-21 17:55:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:55:13,846 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:13,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:13,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:14,061 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1920919838, now seen corresponding path program 1 times [2021-08-21 17:55:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816717695] [2021-08-21 17:55:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:14,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:14,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816717695] [2021-08-21 17:55:14,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816717695] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:55:14,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:55:14,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:55:14,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480776774] [2021-08-21 17:55:14,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:55:14,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:14,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:55:14,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:14,090 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:14,125 INFO L93 Difference]: Finished difference Result 128 states and 178 transitions. [2021-08-21 17:55:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:55:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:55:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:14,127 INFO L225 Difference]: With dead ends: 128 [2021-08-21 17:55:14,127 INFO L226 Difference]: Without dead ends: 126 [2021-08-21 17:55:14,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:14,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-21 17:55:14,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2021-08-21 17:55:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.4303797468354431) internal successors, (113), 79 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 113 transitions. [2021-08-21 17:55:14,132 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 113 transitions. Word has length 16 [2021-08-21 17:55:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:14,133 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 113 transitions. [2021-08-21 17:55:14,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 113 transitions. [2021-08-21 17:55:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:55:14,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:14,133 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:14,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 17:55:14,134 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:14,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash -263281272, now seen corresponding path program 2 times [2021-08-21 17:55:14,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:14,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530715350] [2021-08-21 17:55:14,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,135 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:14,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:14,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530715350] [2021-08-21 17:55:14,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530715350] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:55:14,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:55:14,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 17:55:14,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849884395] [2021-08-21 17:55:14,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:55:14,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:14,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:55:14,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:14,196 INFO L87 Difference]: Start difference. First operand 80 states and 113 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:14,251 INFO L93 Difference]: Finished difference Result 118 states and 168 transitions. [2021-08-21 17:55:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:55:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:55:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:14,258 INFO L225 Difference]: With dead ends: 118 [2021-08-21 17:55:14,258 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 17:55:14,258 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 [2021-08-21 17:55:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 17:55:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2021-08-21 17:55:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 77 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2021-08-21 17:55:14,271 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 110 transitions. Word has length 16 [2021-08-21 17:55:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:14,271 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 110 transitions. [2021-08-21 17:55:14,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 110 transitions. [2021-08-21 17:55:14,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:55:14,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:14,273 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] [2021-08-21 17:55:14,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 17:55:14,273 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:14,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2144240330, now seen corresponding path program 1 times [2021-08-21 17:55:14,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:14,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160450961] [2021-08-21 17:55:14,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:14,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:14,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160450961] [2021-08-21 17:55:14,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160450961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:14,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724761438] [2021-08-21 17:55:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:14,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:14,381 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) [2021-08-21 17:55:14,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 17:55:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:55:14,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724761438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:14,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-21 17:55:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759114673] [2021-08-21 17:55:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:55:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:55:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:55:14,513 INFO L87 Difference]: Start difference. First operand 78 states and 110 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-08-21 17:55:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:14,609 INFO L93 Difference]: Finished difference Result 178 states and 254 transitions. [2021-08-21 17:55:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:55:14,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 21 [2021-08-21 17:55:14,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:14,610 INFO L225 Difference]: With dead ends: 178 [2021-08-21 17:55:14,611 INFO L226 Difference]: Without dead ends: 178 [2021-08-21 17:55:14,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:55:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-21 17:55:14,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 126. [2021-08-21 17:55:14,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.44) internal successors, (180), 125 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2021-08-21 17:55:14,618 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 21 [2021-08-21 17:55:14,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:14,618 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2021-08-21 17:55:14,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2021-08-21 17:55:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2021-08-21 17:55:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:55:14,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:14,619 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:14,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:14,838 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 [2021-08-21 17:55:14,838 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:14,839 INFO L82 PathProgramCache]: Analyzing trace with hash 403720162, now seen corresponding path program 2 times [2021-08-21 17:55:14,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:14,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686171199] [2021-08-21 17:55:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:14,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:14,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686171199] [2021-08-21 17:55:14,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686171199] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:55:14,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:55:14,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:55:14,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948283346] [2021-08-21 17:55:14,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:55:14,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:55:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:14,894 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:14,907 INFO L93 Difference]: Finished difference Result 202 states and 282 transitions. [2021-08-21 17:55:14,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:55:14,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:55:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:14,908 INFO L225 Difference]: With dead ends: 202 [2021-08-21 17:55:14,908 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 17:55:14,909 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 17:55:14,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 182. [2021-08-21 17:55:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.425414364640884) internal successors, (258), 181 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 258 transitions. [2021-08-21 17:55:14,925 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 258 transitions. Word has length 26 [2021-08-21 17:55:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:14,926 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 258 transitions. [2021-08-21 17:55:14,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 258 transitions. [2021-08-21 17:55:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:55:14,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:14,927 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, 1] [2021-08-21 17:55:14,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 17:55:14,927 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:14,928 INFO L82 PathProgramCache]: Analyzing trace with hash 759957506, now seen corresponding path program 1 times [2021-08-21 17:55:14,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:14,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519786189] [2021-08-21 17:55:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:14,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:14,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519786189] [2021-08-21 17:55:14,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519786189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:14,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827436378] [2021-08-21 17:55:14,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:14,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:14,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:14,988 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) [2021-08-21 17:55:14,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 17:55:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:55:15,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:15,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827436378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:15,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:15,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:15,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487663984] [2021-08-21 17:55:15,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:15,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:15,149 INFO L87 Difference]: Start difference. First operand 182 states and 258 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:15,228 INFO L93 Difference]: Finished difference Result 422 states and 576 transitions. [2021-08-21 17:55:15,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:55:15,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:55:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:15,231 INFO L225 Difference]: With dead ends: 422 [2021-08-21 17:55:15,231 INFO L226 Difference]: Without dead ends: 422 [2021-08-21 17:55:15,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-21 17:55:15,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 280. [2021-08-21 17:55:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.4157706093189963) internal successors, (395), 279 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 395 transitions. [2021-08-21 17:55:15,248 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 395 transitions. Word has length 26 [2021-08-21 17:55:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:15,249 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 395 transitions. [2021-08-21 17:55:15,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 395 transitions. [2021-08-21 17:55:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:55:15,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:15,253 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, 1] [2021-08-21 17:55:15,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:15,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:15,454 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:15,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:15,455 INFO L82 PathProgramCache]: Analyzing trace with hash -79924384, now seen corresponding path program 2 times [2021-08-21 17:55:15,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:15,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701357816] [2021-08-21 17:55:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:15,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:15,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:15,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701357816] [2021-08-21 17:55:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701357816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:15,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263155265] [2021-08-21 17:55:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:15,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:15,547 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) [2021-08-21 17:55:15,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 17:55:15,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:15,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:55:15,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:15,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263155265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:15,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:15,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 17:55:15,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736215865] [2021-08-21 17:55:15,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:55:15,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:55:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:15,775 INFO L87 Difference]: Start difference. First operand 280 states and 395 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:15,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:15,834 INFO L93 Difference]: Finished difference Result 554 states and 758 transitions. [2021-08-21 17:55:15,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:55:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 17:55:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:15,849 INFO L225 Difference]: With dead ends: 554 [2021-08-21 17:55:15,849 INFO L226 Difference]: Without dead ends: 554 [2021-08-21 17:55:15,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-08-21 17:55:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 414. [2021-08-21 17:55:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.4285714285714286) internal successors, (590), 413 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 590 transitions. [2021-08-21 17:55:15,859 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 590 transitions. Word has length 26 [2021-08-21 17:55:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:15,873 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 590 transitions. [2021-08-21 17:55:15,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 590 transitions. [2021-08-21 17:55:15,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:15,880 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:15,880 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:15,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:16,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:16,096 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1415775031, now seen corresponding path program 3 times [2021-08-21 17:55:16,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:16,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665065597] [2021-08-21 17:55:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:16,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 17:55:16,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:16,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665065597] [2021-08-21 17:55:16,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665065597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:55:16,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:55:16,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:55:16,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527563150] [2021-08-21 17:55:16,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:55:16,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:55:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:16,144 INFO L87 Difference]: Start difference. First operand 414 states and 590 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:16,166 INFO L93 Difference]: Finished difference Result 694 states and 948 transitions. [2021-08-21 17:55:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:55:16,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:55:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:16,171 INFO L225 Difference]: With dead ends: 694 [2021-08-21 17:55:16,171 INFO L226 Difference]: Without dead ends: 694 [2021-08-21 17:55:16,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:55:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-21 17:55:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 688. [2021-08-21 17:55:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.3726346433770014) internal successors, (943), 687 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 943 transitions. [2021-08-21 17:55:16,202 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 943 transitions. Word has length 31 [2021-08-21 17:55:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:16,202 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 943 transitions. [2021-08-21 17:55:16,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 943 transitions. [2021-08-21 17:55:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:16,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:16,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:16,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-21 17:55:16,204 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash 588192937, now seen corresponding path program 1 times [2021-08-21 17:55:16,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:16,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853096357] [2021-08-21 17:55:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:16,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:55:16,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:16,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853096357] [2021-08-21 17:55:16,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853096357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:16,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821364406] [2021-08-21 17:55:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:16,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:16,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:16,317 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) [2021-08-21 17:55:16,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 17:55:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:16,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:16,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:55:16,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821364406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:16,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:16,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 17:55:16,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862049071] [2021-08-21 17:55:16,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:55:16,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:55:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:16,581 INFO L87 Difference]: Start difference. First operand 688 states and 943 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:16,607 INFO L93 Difference]: Finished difference Result 984 states and 1337 transitions. [2021-08-21 17:55:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:55:16,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:16,611 INFO L225 Difference]: With dead ends: 984 [2021-08-21 17:55:16,611 INFO L226 Difference]: Without dead ends: 980 [2021-08-21 17:55:16,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-08-21 17:55:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 893. [2021-08-21 17:55:16,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 1.383408071748879) internal successors, (1234), 892 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1234 transitions. [2021-08-21 17:55:16,626 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1234 transitions. Word has length 31 [2021-08-21 17:55:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:16,626 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1234 transitions. [2021-08-21 17:55:16,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1234 transitions. [2021-08-21 17:55:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:16,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:16,628 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:16,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 17:55:16,845 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:16,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:16,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1877199081, now seen corresponding path program 2 times [2021-08-21 17:55:16,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:16,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900873483] [2021-08-21 17:55:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:16,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:55:16,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:16,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900873483] [2021-08-21 17:55:16,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900873483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:16,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260724614] [2021-08-21 17:55:16,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:16,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:16,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:16,905 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) [2021-08-21 17:55:16,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 17:55:16,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:16,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:55:17,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260724614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:17,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:17,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 17:55:17,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899879136] [2021-08-21 17:55:17,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:55:17,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:55:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:17,175 INFO L87 Difference]: Start difference. First operand 893 states and 1234 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:17,205 INFO L93 Difference]: Finished difference Result 1283 states and 1749 transitions. [2021-08-21 17:55:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:55:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:17,209 INFO L225 Difference]: With dead ends: 1283 [2021-08-21 17:55:17,209 INFO L226 Difference]: Without dead ends: 1279 [2021-08-21 17:55:17,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-08-21 17:55:17,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1166. [2021-08-21 17:55:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.3896995708154507) internal successors, (1619), 1165 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:17,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1619 transitions. [2021-08-21 17:55:17,226 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1619 transitions. Word has length 31 [2021-08-21 17:55:17,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:17,226 INFO L470 AbstractCegarLoop]: Abstraction has 1166 states and 1619 transitions. [2021-08-21 17:55:17,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1619 transitions. [2021-08-21 17:55:17,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:17,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:17,228 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:17,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:17,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:17,445 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash -282107507, now seen corresponding path program 3 times [2021-08-21 17:55:17,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:17,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863067933] [2021-08-21 17:55:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:17,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:17,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:17,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863067933] [2021-08-21 17:55:17,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863067933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:17,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170537826] [2021-08-21 17:55:17,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:17,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:17,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:17,503 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) [2021-08-21 17:55:17,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 17:55:17,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:55:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:17,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170537826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:17,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:17,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:17,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163279565] [2021-08-21 17:55:17,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:17,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:17,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:17,775 INFO L87 Difference]: Start difference. First operand 1166 states and 1619 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:17,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:17,826 INFO L93 Difference]: Finished difference Result 2105 states and 2875 transitions. [2021-08-21 17:55:17,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:55:17,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:17,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:17,831 INFO L225 Difference]: With dead ends: 2105 [2021-08-21 17:55:17,832 INFO L226 Difference]: Without dead ends: 2101 [2021-08-21 17:55:17,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2021-08-21 17:55:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1767. [2021-08-21 17:55:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 1.3901472253680633) internal successors, (2455), 1766 states have internal predecessors, (2455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2455 transitions. [2021-08-21 17:55:17,868 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2455 transitions. Word has length 31 [2021-08-21 17:55:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:17,868 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 2455 transitions. [2021-08-21 17:55:17,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2455 transitions. [2021-08-21 17:55:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:17,871 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:17,871 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:17,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:18,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:18,090 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1032779379, now seen corresponding path program 4 times [2021-08-21 17:55:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:18,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950049834] [2021-08-21 17:55:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:18,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:18,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:18,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950049834] [2021-08-21 17:55:18,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950049834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:18,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099325197] [2021-08-21 17:55:18,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:18,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:18,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:18,157 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) [2021-08-21 17:55:18,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 17:55:18,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:55:18,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:18,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099325197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:18,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:18,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:18,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198946870] [2021-08-21 17:55:18,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:18,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:18,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:18,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:18,459 INFO L87 Difference]: Start difference. First operand 1767 states and 2455 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:18,503 INFO L93 Difference]: Finished difference Result 2297 states and 3147 transitions. [2021-08-21 17:55:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:55:18,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:18,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:18,509 INFO L225 Difference]: With dead ends: 2297 [2021-08-21 17:55:18,509 INFO L226 Difference]: Without dead ends: 2293 [2021-08-21 17:55:18,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-08-21 17:55:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2014. [2021-08-21 17:55:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2013 states have (on average 1.3854942871336313) internal successors, (2789), 2013 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:18,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 2789 transitions. [2021-08-21 17:55:18,542 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 2789 transitions. Word has length 31 [2021-08-21 17:55:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:18,542 INFO L470 AbstractCegarLoop]: Abstraction has 2014 states and 2789 transitions. [2021-08-21 17:55:18,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 2789 transitions. [2021-08-21 17:55:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:18,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:18,545 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:18,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:18,764 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,SelfDestructingSolverStorable12 [2021-08-21 17:55:18,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:18,765 INFO L82 PathProgramCache]: Analyzing trace with hash -917598935, now seen corresponding path program 5 times [2021-08-21 17:55:18,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:18,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118177932] [2021-08-21 17:55:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:18,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:18,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:55:18,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:18,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118177932] [2021-08-21 17:55:18,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118177932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:18,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395856631] [2021-08-21 17:55:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:18,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:18,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:18,826 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) [2021-08-21 17:55:18,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 17:55:18,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:55:18,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:18,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 17:55:19,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395856631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:19,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:19,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 17:55:19,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137792423] [2021-08-21 17:55:19,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:55:19,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:19,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:55:19,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:19,160 INFO L87 Difference]: Start difference. First operand 2014 states and 2789 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:19,191 INFO L93 Difference]: Finished difference Result 2241 states and 3077 transitions. [2021-08-21 17:55:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:55:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:19,196 INFO L225 Difference]: With dead ends: 2241 [2021-08-21 17:55:19,196 INFO L226 Difference]: Without dead ends: 2237 [2021-08-21 17:55:19,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:55:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2021-08-21 17:55:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2124. [2021-08-21 17:55:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 1.3881300047103156) internal successors, (2947), 2123 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:19,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 2947 transitions. [2021-08-21 17:55:19,223 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 2947 transitions. Word has length 31 [2021-08-21 17:55:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:19,223 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 2947 transitions. [2021-08-21 17:55:19,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 2947 transitions. [2021-08-21 17:55:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:19,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:19,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:19,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:19,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 17:55:19,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1321606865, now seen corresponding path program 6 times [2021-08-21 17:55:19,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:19,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554210560] [2021-08-21 17:55:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:19,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:19,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554210560] [2021-08-21 17:55:19,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554210560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:19,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332684163] [2021-08-21 17:55:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:19,500 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:19,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:19,501 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) [2021-08-21 17:55:19,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 17:55:19,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:55:19,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:19,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332684163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:19,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:19,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:19,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833937010] [2021-08-21 17:55:19,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:19,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:19,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:19,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:19,896 INFO L87 Difference]: Start difference. First operand 2124 states and 2947 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:19,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:19,944 INFO L93 Difference]: Finished difference Result 2839 states and 3892 transitions. [2021-08-21 17:55:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:55:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:19,950 INFO L225 Difference]: With dead ends: 2839 [2021-08-21 17:55:19,950 INFO L226 Difference]: Without dead ends: 2835 [2021-08-21 17:55:19,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2021-08-21 17:55:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2401. [2021-08-21 17:55:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2400 states have (on average 1.3820833333333333) internal successors, (3317), 2400 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3317 transitions. [2021-08-21 17:55:19,980 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3317 transitions. Word has length 31 [2021-08-21 17:55:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:19,981 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 3317 transitions. [2021-08-21 17:55:19,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3317 transitions. [2021-08-21 17:55:19,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:55:19,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:19,983 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:20,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:20,197 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,SelfDestructingSolverStorable14 [2021-08-21 17:55:20,197 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2072278737, now seen corresponding path program 7 times [2021-08-21 17:55:20,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:20,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356821229] [2021-08-21 17:55:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:20,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:20,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:20,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356821229] [2021-08-21 17:55:20,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356821229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:20,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627277754] [2021-08-21 17:55:20,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:20,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:20,254 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) [2021-08-21 17:55:20,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 17:55:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:20,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:20,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627277754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:20,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:20,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:20,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828909734] [2021-08-21 17:55:20,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:20,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:20,654 INFO L87 Difference]: Start difference. First operand 2401 states and 3317 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:20,737 INFO L93 Difference]: Finished difference Result 2963 states and 4042 transitions. [2021-08-21 17:55:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:55:20,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-08-21 17:55:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:20,747 INFO L225 Difference]: With dead ends: 2963 [2021-08-21 17:55:20,747 INFO L226 Difference]: Without dead ends: 2959 [2021-08-21 17:55:20,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-08-21 17:55:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 1962. [2021-08-21 17:55:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 1.3686894441611424) internal successors, (2684), 1961 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 2684 transitions. [2021-08-21 17:55:20,788 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 2684 transitions. Word has length 31 [2021-08-21 17:55:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 2684 transitions. [2021-08-21 17:55:20,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 2684 transitions. [2021-08-21 17:55:20,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:20,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:20,793 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:20,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:21,006 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,SelfDestructingSolverStorable15 [2021-08-21 17:55:21,007 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:21,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1786390529, now seen corresponding path program 8 times [2021-08-21 17:55:21,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:21,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411268602] [2021-08-21 17:55:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:21,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:21,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:21,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411268602] [2021-08-21 17:55:21,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411268602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:21,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161777427] [2021-08-21 17:55:21,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:21,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:21,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:21,062 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) [2021-08-21 17:55:21,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 17:55:21,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:21,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:21,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:21,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:21,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161777427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:21,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:21,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:21,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399969256] [2021-08-21 17:55:21,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:21,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:21,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:21,510 INFO L87 Difference]: Start difference. First operand 1962 states and 2684 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 17:55:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:21,623 INFO L93 Difference]: Finished difference Result 4086 states and 5420 transitions. [2021-08-21 17:55:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 36 [2021-08-21 17:55:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:21,638 INFO L225 Difference]: With dead ends: 4086 [2021-08-21 17:55:21,638 INFO L226 Difference]: Without dead ends: 4086 [2021-08-21 17:55:21,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-08-21 17:55:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 2478. [2021-08-21 17:55:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 1.3484053290270488) internal successors, (3340), 2477 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3340 transitions. [2021-08-21 17:55:21,692 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3340 transitions. Word has length 36 [2021-08-21 17:55:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:21,692 INFO L470 AbstractCegarLoop]: Abstraction has 2478 states and 3340 transitions. [2021-08-21 17:55:21,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 17:55:21,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3340 transitions. [2021-08-21 17:55:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:21,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:21,696 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:21,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:21,913 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,SelfDestructingSolverStorable16 [2021-08-21 17:55:21,914 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:21,914 INFO L82 PathProgramCache]: Analyzing trace with hash 362788994, now seen corresponding path program 9 times [2021-08-21 17:55:21,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:21,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771442412] [2021-08-21 17:55:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:21,915 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:21,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:21,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771442412] [2021-08-21 17:55:21,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771442412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:21,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109358856] [2021-08-21 17:55:21,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:21,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:21,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:21,977 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) [2021-08-21 17:55:21,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 17:55:22,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:55:22,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:22,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:22,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:22,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109358856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:22,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:22,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:22,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456791031] [2021-08-21 17:55:22,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:22,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:22,333 INFO L87 Difference]: Start difference. First operand 2478 states and 3340 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 17:55:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:22,416 INFO L93 Difference]: Finished difference Result 4894 states and 6458 transitions. [2021-08-21 17:55:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:22,417 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 36 [2021-08-21 17:55:22,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:22,431 INFO L225 Difference]: With dead ends: 4894 [2021-08-21 17:55:22,431 INFO L226 Difference]: Without dead ends: 4846 [2021-08-21 17:55:22,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2021-08-21 17:55:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4394. [2021-08-21 17:55:22,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4394 states, 4393 states have (on average 1.3494195310721602) internal successors, (5928), 4393 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 5928 transitions. [2021-08-21 17:55:22,508 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 5928 transitions. Word has length 36 [2021-08-21 17:55:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:22,508 INFO L470 AbstractCegarLoop]: Abstraction has 4394 states and 5928 transitions. [2021-08-21 17:55:22,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 17:55:22,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 5928 transitions. [2021-08-21 17:55:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:22,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:22,514 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:22,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:22,720 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,SelfDestructingSolverStorable17 [2021-08-21 17:55:22,721 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1331011736, now seen corresponding path program 10 times [2021-08-21 17:55:22,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:22,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309138663] [2021-08-21 17:55:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:22,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:22,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:22,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309138663] [2021-08-21 17:55:22,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309138663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:22,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171373797] [2021-08-21 17:55:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:22,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:22,773 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) [2021-08-21 17:55:22,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 17:55:23,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:55:23,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:23,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:23,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:23,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171373797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:23,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:23,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:23,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011763940] [2021-08-21 17:55:23,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:23,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:23,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:23,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:23,220 INFO L87 Difference]: Start difference. First operand 4394 states and 5928 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:23,284 INFO L93 Difference]: Finished difference Result 4814 states and 6371 transitions. [2021-08-21 17:55:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:23,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:23,292 INFO L225 Difference]: With dead ends: 4814 [2021-08-21 17:55:23,292 INFO L226 Difference]: Without dead ends: 4814 [2021-08-21 17:55:23,293 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4814 states. [2021-08-21 17:55:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4814 to 4414. [2021-08-21 17:55:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4414 states, 4413 states have (on average 1.3487423521414004) internal successors, (5952), 4413 states have internal predecessors, (5952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:23,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4414 states to 4414 states and 5952 transitions. [2021-08-21 17:55:23,357 INFO L78 Accepts]: Start accepts. Automaton has 4414 states and 5952 transitions. Word has length 36 [2021-08-21 17:55:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:23,357 INFO L470 AbstractCegarLoop]: Abstraction has 4414 states and 5952 transitions. [2021-08-21 17:55:23,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4414 states and 5952 transitions. [2021-08-21 17:55:23,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:23,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:23,363 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 17:55:23,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:23,586 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:23,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1835000511, now seen corresponding path program 11 times [2021-08-21 17:55:23,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:23,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45394232] [2021-08-21 17:55:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:23,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:23,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:23,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45394232] [2021-08-21 17:55:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45394232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:23,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174798731] [2021-08-21 17:55:23,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:23,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:23,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:23,622 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) [2021-08-21 17:55:23,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 17:55:23,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:55:23,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:23,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:24,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174798731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:24,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:24,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:24,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696624107] [2021-08-21 17:55:24,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:24,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:24,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:24,005 INFO L87 Difference]: Start difference. First operand 4414 states and 5952 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:24,065 INFO L93 Difference]: Finished difference Result 7492 states and 10105 transitions. [2021-08-21 17:55:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:24,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:24,076 INFO L225 Difference]: With dead ends: 7492 [2021-08-21 17:55:24,076 INFO L226 Difference]: Without dead ends: 7492 [2021-08-21 17:55:24,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2021-08-21 17:55:24,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 5114. [2021-08-21 17:55:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5113 states have (on average 1.3440250342264815) internal successors, (6872), 5113 states have internal predecessors, (6872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 6872 transitions. [2021-08-21 17:55:24,139 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 6872 transitions. Word has length 36 [2021-08-21 17:55:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:24,140 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 6872 transitions. [2021-08-21 17:55:24,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 6872 transitions. [2021-08-21 17:55:24,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:24,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:24,145 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:24,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:24,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:24,362 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:24,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:24,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2102008708, now seen corresponding path program 12 times [2021-08-21 17:55:24,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:24,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697685404] [2021-08-21 17:55:24,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:24,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:24,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:24,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697685404] [2021-08-21 17:55:24,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697685404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:24,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914763524] [2021-08-21 17:55:24,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:24,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:24,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:24,405 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) [2021-08-21 17:55:24,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 17:55:24,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:55:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:24,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914763524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:24,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:24,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:24,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820033941] [2021-08-21 17:55:24,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:24,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:24,765 INFO L87 Difference]: Start difference. First operand 5114 states and 6872 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:24,841 INFO L93 Difference]: Finished difference Result 6472 states and 8539 transitions. [2021-08-21 17:55:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:24,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:24,853 INFO L225 Difference]: With dead ends: 6472 [2021-08-21 17:55:24,853 INFO L226 Difference]: Without dead ends: 6468 [2021-08-21 17:55:24,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2021-08-21 17:55:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 6054. [2021-08-21 17:55:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 1.3381794151660333) internal successors, (8100), 6053 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 8100 transitions. [2021-08-21 17:55:24,940 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 8100 transitions. Word has length 36 [2021-08-21 17:55:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 6054 states and 8100 transitions. [2021-08-21 17:55:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 8100 transitions. [2021-08-21 17:55:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:24,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:24,947 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:24,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:25,161 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:25,161 INFO L82 PathProgramCache]: Analyzing trace with hash -535320022, now seen corresponding path program 13 times [2021-08-21 17:55:25,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:25,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340549527] [2021-08-21 17:55:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:25,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:25,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:25,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340549527] [2021-08-21 17:55:25,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340549527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:25,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665474286] [2021-08-21 17:55:25,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:25,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:25,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:25,205 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) [2021-08-21 17:55:25,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 17:55:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:25,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665474286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:25,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:25,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:25,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088534614] [2021-08-21 17:55:25,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:25,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:25,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:25,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:25,627 INFO L87 Difference]: Start difference. First operand 6054 states and 8100 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:25,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:25,681 INFO L93 Difference]: Finished difference Result 6460 states and 8501 transitions. [2021-08-21 17:55:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:55:25,681 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:25,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:25,688 INFO L225 Difference]: With dead ends: 6460 [2021-08-21 17:55:25,689 INFO L226 Difference]: Without dead ends: 6460 [2021-08-21 17:55:25,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6460 states. [2021-08-21 17:55:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6460 to 5954. [2021-08-21 17:55:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5954 states, 5953 states have (on average 1.3371409373425165) internal successors, (7960), 5953 states have internal predecessors, (7960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5954 states to 5954 states and 7960 transitions. [2021-08-21 17:55:25,814 INFO L78 Accepts]: Start accepts. Automaton has 5954 states and 7960 transitions. Word has length 36 [2021-08-21 17:55:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:25,814 INFO L470 AbstractCegarLoop]: Abstraction has 5954 states and 7960 transitions. [2021-08-21 17:55:25,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 5954 states and 7960 transitions. [2021-08-21 17:55:25,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:25,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:25,819 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:25,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:26,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:26,036 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -145116096, now seen corresponding path program 14 times [2021-08-21 17:55:26,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:26,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500845571] [2021-08-21 17:55:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:26,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:26,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:26,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500845571] [2021-08-21 17:55:26,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500845571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:26,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606162816] [2021-08-21 17:55:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:26,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:26,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:26,099 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) [2021-08-21 17:55:26,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 17:55:26,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:26,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:26,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606162816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:26,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:26,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:26,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228981524] [2021-08-21 17:55:26,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:26,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:26,454 INFO L87 Difference]: Start difference. First operand 5954 states and 7960 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) [2021-08-21 17:55:26,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:26,532 INFO L93 Difference]: Finished difference Result 6472 states and 8589 transitions. [2021-08-21 17:55:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:26,532 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 36 [2021-08-21 17:55:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:26,540 INFO L225 Difference]: With dead ends: 6472 [2021-08-21 17:55:26,540 INFO L226 Difference]: Without dead ends: 6472 [2021-08-21 17:55:26,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:55:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6472 states. [2021-08-21 17:55:26,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6472 to 6138. [2021-08-21 17:55:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6138 states, 6137 states have (on average 1.3335505947531368) internal successors, (8184), 6137 states have internal predecessors, (8184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:26,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6138 states to 6138 states and 8184 transitions. [2021-08-21 17:55:26,607 INFO L78 Accepts]: Start accepts. Automaton has 6138 states and 8184 transitions. Word has length 36 [2021-08-21 17:55:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:26,607 INFO L470 AbstractCegarLoop]: Abstraction has 6138 states and 8184 transitions. [2021-08-21 17:55:26,607 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) [2021-08-21 17:55:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 6138 states and 8184 transitions. [2021-08-21 17:55:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:26,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:26,612 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:26,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-21 17:55:26,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:26,825 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:26,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:26,825 INFO L82 PathProgramCache]: Analyzing trace with hash -181279101, now seen corresponding path program 15 times [2021-08-21 17:55:26,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:26,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222143091] [2021-08-21 17:55:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:26,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:55:26,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:26,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222143091] [2021-08-21 17:55:26,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222143091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:26,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997412755] [2021-08-21 17:55:26,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:26,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:26,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:26,888 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) [2021-08-21 17:55:26,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 17:55:27,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:55:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:55:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997412755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:27,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:27,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:27,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903166485] [2021-08-21 17:55:27,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:27,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:27,351 INFO L87 Difference]: Start difference. First operand 6138 states and 8184 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:27,437 INFO L93 Difference]: Finished difference Result 7410 states and 9628 transitions. [2021-08-21 17:55:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 17:55:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:27,453 INFO L225 Difference]: With dead ends: 7410 [2021-08-21 17:55:27,453 INFO L226 Difference]: Without dead ends: 7410 [2021-08-21 17:55:27,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:55:27,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2021-08-21 17:55:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 6110. [2021-08-21 17:55:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 6109 states have (on average 1.3232935013913898) internal successors, (8084), 6109 states have internal predecessors, (8084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 8084 transitions. [2021-08-21 17:55:27,545 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 8084 transitions. Word has length 36 [2021-08-21 17:55:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:27,545 INFO L470 AbstractCegarLoop]: Abstraction has 6110 states and 8084 transitions. [2021-08-21 17:55:27,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 8084 transitions. [2021-08-21 17:55:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:27,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:27,554 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:27,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:27,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:27,789 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2051016288, now seen corresponding path program 16 times [2021-08-21 17:55:27,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:27,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606126350] [2021-08-21 17:55:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:27,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:55:27,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:27,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606126350] [2021-08-21 17:55:27,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606126350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:27,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519716683] [2021-08-21 17:55:27,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:27,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:27,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:27,827 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) [2021-08-21 17:55:27,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 17:55:28,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:55:28,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:28,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:55:28,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519716683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:28,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:28,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:28,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411498365] [2021-08-21 17:55:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:28,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:28,302 INFO L87 Difference]: Start difference. First operand 6110 states and 8084 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:28,371 INFO L93 Difference]: Finished difference Result 6272 states and 8254 transitions. [2021-08-21 17:55:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 17:55:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:28,381 INFO L225 Difference]: With dead ends: 6272 [2021-08-21 17:55:28,381 INFO L226 Difference]: Without dead ends: 6248 [2021-08-21 17:55:28,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:55:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6248 states. [2021-08-21 17:55:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6248 to 6106. [2021-08-21 17:55:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6106 states, 6105 states have (on average 1.3225225225225226) internal successors, (8074), 6105 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6106 states to 6106 states and 8074 transitions. [2021-08-21 17:55:28,465 INFO L78 Accepts]: Start accepts. Automaton has 6106 states and 8074 transitions. Word has length 36 [2021-08-21 17:55:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 6106 states and 8074 transitions. [2021-08-21 17:55:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6106 states and 8074 transitions. [2021-08-21 17:55:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:28,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:28,473 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:28,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:28,709 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,SelfDestructingSolverStorable24 [2021-08-21 17:55:28,710 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1132438655, now seen corresponding path program 17 times [2021-08-21 17:55:28,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:28,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881586011] [2021-08-21 17:55:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:28,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:28,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:28,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:28,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881586011] [2021-08-21 17:55:28,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881586011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:28,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109796105] [2021-08-21 17:55:28,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:28,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:28,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:28,752 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) [2021-08-21 17:55:28,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 17:55:29,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:55:29,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:29,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109796105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:29,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:29,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:29,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891681720] [2021-08-21 17:55:29,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:29,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:29,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:29,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:29,178 INFO L87 Difference]: Start difference. First operand 6106 states and 8074 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:29,245 INFO L93 Difference]: Finished difference Result 9094 states and 11759 transitions. [2021-08-21 17:55:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:29,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:29,254 INFO L225 Difference]: With dead ends: 9094 [2021-08-21 17:55:29,254 INFO L226 Difference]: Without dead ends: 9094 [2021-08-21 17:55:29,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9094 states. [2021-08-21 17:55:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9094 to 7906. [2021-08-21 17:55:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7906 states, 7905 states have (on average 1.323213156230234) internal successors, (10460), 7905 states have internal predecessors, (10460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7906 states to 7906 states and 10460 transitions. [2021-08-21 17:55:29,383 INFO L78 Accepts]: Start accepts. Automaton has 7906 states and 10460 transitions. Word has length 36 [2021-08-21 17:55:29,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:29,383 INFO L470 AbstractCegarLoop]: Abstraction has 7906 states and 10460 transitions. [2021-08-21 17:55:29,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:29,383 INFO L276 IsEmpty]: Start isEmpty. Operand 7906 states and 10460 transitions. [2021-08-21 17:55:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:29,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:29,389 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:29,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:29,603 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,SelfDestructingSolverStorable25 [2021-08-21 17:55:29,603 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:29,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 774480578, now seen corresponding path program 18 times [2021-08-21 17:55:29,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:29,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985145621] [2021-08-21 17:55:29,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:29,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:29,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:29,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985145621] [2021-08-21 17:55:29,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985145621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:29,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6506650] [2021-08-21 17:55:29,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:29,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:29,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:29,634 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) [2021-08-21 17:55:29,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 17:55:29,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:55:29,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:29,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:29,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:30,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6506650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:30,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:30,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:30,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168064945] [2021-08-21 17:55:30,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:30,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:30,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:30,050 INFO L87 Difference]: Start difference. First operand 7906 states and 10460 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:30,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:30,102 INFO L93 Difference]: Finished difference Result 9202 states and 12092 transitions. [2021-08-21 17:55:30,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:55:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:30,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:30,115 INFO L225 Difference]: With dead ends: 9202 [2021-08-21 17:55:30,115 INFO L226 Difference]: Without dead ends: 9198 [2021-08-21 17:55:30,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9198 states. [2021-08-21 17:55:30,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9198 to 9098. [2021-08-21 17:55:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9098 states, 9097 states have (on average 1.3173573705617236) internal successors, (11984), 9097 states have internal predecessors, (11984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9098 states to 9098 states and 11984 transitions. [2021-08-21 17:55:30,213 INFO L78 Accepts]: Start accepts. Automaton has 9098 states and 11984 transitions. Word has length 36 [2021-08-21 17:55:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:30,213 INFO L470 AbstractCegarLoop]: Abstraction has 9098 states and 11984 transitions. [2021-08-21 17:55:30,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 9098 states and 11984 transitions. [2021-08-21 17:55:30,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:30,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:30,220 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:30,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:30,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 17:55:30,438 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1862848152, now seen corresponding path program 19 times [2021-08-21 17:55:30,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:30,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513118730] [2021-08-21 17:55:30,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:30,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:30,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:30,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513118730] [2021-08-21 17:55:30,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513118730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:30,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707782120] [2021-08-21 17:55:30,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:30,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:30,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:30,481 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) [2021-08-21 17:55:30,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 17:55:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:30,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:30,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707782120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:30,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:30,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 17:55:30,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690711701] [2021-08-21 17:55:30,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:55:30,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:55:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:55:30,990 INFO L87 Difference]: Start difference. First operand 9098 states and 11984 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:31,046 INFO L93 Difference]: Finished difference Result 9218 states and 12126 transitions. [2021-08-21 17:55:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:55:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-08-21 17:55:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:31,060 INFO L225 Difference]: With dead ends: 9218 [2021-08-21 17:55:31,060 INFO L226 Difference]: Without dead ends: 9218 [2021-08-21 17:55:31,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-08-21 17:55:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 9098. [2021-08-21 17:55:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9098 states, 9097 states have (on average 1.3173573705617236) internal successors, (11984), 9097 states have internal predecessors, (11984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9098 states to 9098 states and 11984 transitions. [2021-08-21 17:55:31,155 INFO L78 Accepts]: Start accepts. Automaton has 9098 states and 11984 transitions. Word has length 36 [2021-08-21 17:55:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:31,155 INFO L470 AbstractCegarLoop]: Abstraction has 9098 states and 11984 transitions. [2021-08-21 17:55:31,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 17:55:31,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9098 states and 11984 transitions. [2021-08-21 17:55:31,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:31,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:31,162 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:31,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:31,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:31,384 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:31,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1472644226, now seen corresponding path program 20 times [2021-08-21 17:55:31,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:31,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652881383] [2021-08-21 17:55:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:31,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:31,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:31,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652881383] [2021-08-21 17:55:31,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652881383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:31,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29501479] [2021-08-21 17:55:31,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:31,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:31,417 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) [2021-08-21 17:55:31,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 17:55:31,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:31,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:31,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29501479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:31,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:31,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:31,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658200279] [2021-08-21 17:55:31,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:31,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:31,911 INFO L87 Difference]: Start difference. First operand 9098 states and 11984 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) [2021-08-21 17:55:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:32,000 INFO L93 Difference]: Finished difference Result 9186 states and 12051 transitions. [2021-08-21 17:55:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:55:32,000 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 36 [2021-08-21 17:55:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:32,012 INFO L225 Difference]: With dead ends: 9186 [2021-08-21 17:55:32,012 INFO L226 Difference]: Without dead ends: 9186 [2021-08-21 17:55:32,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:55:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9186 states. [2021-08-21 17:55:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9186 to 8578. [2021-08-21 17:55:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8578 states, 8577 states have (on average 1.3202751544829194) internal successors, (11324), 8577 states have internal predecessors, (11324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:32,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8578 states to 8578 states and 11324 transitions. [2021-08-21 17:55:32,151 INFO L78 Accepts]: Start accepts. Automaton has 8578 states and 11324 transitions. Word has length 36 [2021-08-21 17:55:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:32,151 INFO L470 AbstractCegarLoop]: Abstraction has 8578 states and 11324 transitions. [2021-08-21 17:55:32,151 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) [2021-08-21 17:55:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 8578 states and 11324 transitions. [2021-08-21 17:55:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:55:32,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:32,162 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:32,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:32,385 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,SelfDestructingSolverStorable28 [2021-08-21 17:55:32,385 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:32,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash -19779296, now seen corresponding path program 21 times [2021-08-21 17:55:32,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:32,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435704596] [2021-08-21 17:55:32,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:32,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:32,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:32,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435704596] [2021-08-21 17:55:32,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435704596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:32,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037190445] [2021-08-21 17:55:32,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:32,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:32,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:32,439 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) [2021-08-21 17:55:32,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 17:55:32,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:55:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 17:55:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037190445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:32,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:32,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:32,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377426462] [2021-08-21 17:55:32,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:32,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:32,933 INFO L87 Difference]: Start difference. First operand 8578 states and 11324 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 17:55:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:33,021 INFO L93 Difference]: Finished difference Result 9082 states and 12003 transitions. [2021-08-21 17:55:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:55:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 36 [2021-08-21 17:55:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:33,029 INFO L225 Difference]: With dead ends: 9082 [2021-08-21 17:55:33,029 INFO L226 Difference]: Without dead ends: 9082 [2021-08-21 17:55:33,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9082 states. [2021-08-21 17:55:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9082 to 8950. [2021-08-21 17:55:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8950 states, 8949 states have (on average 1.3217119231199017) internal successors, (11828), 8949 states have internal predecessors, (11828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:33,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8950 states to 8950 states and 11828 transitions. [2021-08-21 17:55:33,171 INFO L78 Accepts]: Start accepts. Automaton has 8950 states and 11828 transitions. Word has length 36 [2021-08-21 17:55:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:33,171 INFO L470 AbstractCegarLoop]: Abstraction has 8950 states and 11828 transitions. [2021-08-21 17:55:33,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 17:55:33,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8950 states and 11828 transitions. [2021-08-21 17:55:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 17:55:33,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:33,178 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:33,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:33,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:33,395 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 344851498, now seen corresponding path program 22 times [2021-08-21 17:55:33,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:33,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099113603] [2021-08-21 17:55:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:33,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-21 17:55:33,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:33,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099113603] [2021-08-21 17:55:33,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099113603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:33,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106458811] [2021-08-21 17:55:33,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:33,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:33,481 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) [2021-08-21 17:55:33,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 17:55:33,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:55:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 17:55:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-21 17:55:34,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106458811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:34,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:34,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 17:55:34,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318341427] [2021-08-21 17:55:34,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:55:34,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:34,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:55:34,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:34,034 INFO L87 Difference]: Start difference. First operand 8950 states and 11828 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:34,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:34,192 INFO L93 Difference]: Finished difference Result 15408 states and 19843 transitions. [2021-08-21 17:55:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:55:34,193 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 17:55:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:34,211 INFO L225 Difference]: With dead ends: 15408 [2021-08-21 17:55:34,211 INFO L226 Difference]: Without dead ends: 15408 [2021-08-21 17:55:34,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:55:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15408 states. [2021-08-21 17:55:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15408 to 8146. [2021-08-21 17:55:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8146 states, 8145 states have (on average 1.298342541436464) internal successors, (10575), 8145 states have internal predecessors, (10575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8146 states to 8146 states and 10575 transitions. [2021-08-21 17:55:34,325 INFO L78 Accepts]: Start accepts. Automaton has 8146 states and 10575 transitions. Word has length 41 [2021-08-21 17:55:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:34,325 INFO L470 AbstractCegarLoop]: Abstraction has 8146 states and 10575 transitions. [2021-08-21 17:55:34,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 8146 states and 10575 transitions. [2021-08-21 17:55:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:34,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:34,333 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:34,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:34,551 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,SelfDestructingSolverStorable30 [2021-08-21 17:55:34,552 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:34,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2124863906, now seen corresponding path program 23 times [2021-08-21 17:55:34,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:34,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067836884] [2021-08-21 17:55:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:34,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:34,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:34,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067836884] [2021-08-21 17:55:34,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067836884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:34,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685903747] [2021-08-21 17:55:34,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:34,626 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:34,627 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) [2021-08-21 17:55:34,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 17:55:35,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:55:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:55:35,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:35,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685903747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:35,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:35,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:55:35,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179977965] [2021-08-21 17:55:35,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:55:35,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:55:35,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:55:35,195 INFO L87 Difference]: Start difference. First operand 8146 states and 10575 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-08-21 17:55:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:35,338 INFO L93 Difference]: Finished difference Result 10962 states and 13970 transitions. [2021-08-21 17:55:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 46 [2021-08-21 17:55:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:35,351 INFO L225 Difference]: With dead ends: 10962 [2021-08-21 17:55:35,352 INFO L226 Difference]: Without dead ends: 10962 [2021-08-21 17:55:35,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:55:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10962 states. [2021-08-21 17:55:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10962 to 8586. [2021-08-21 17:55:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8586 states, 8585 states have (on average 1.2944670937682003) internal successors, (11113), 8585 states have internal predecessors, (11113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8586 states to 8586 states and 11113 transitions. [2021-08-21 17:55:35,459 INFO L78 Accepts]: Start accepts. Automaton has 8586 states and 11113 transitions. Word has length 46 [2021-08-21 17:55:35,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:35,459 INFO L470 AbstractCegarLoop]: Abstraction has 8586 states and 11113 transitions. [2021-08-21 17:55:35,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-08-21 17:55:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8586 states and 11113 transitions. [2021-08-21 17:55:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:35,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:35,467 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:35,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:35,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:35,688 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:35,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1742295616, now seen corresponding path program 24 times [2021-08-21 17:55:35,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:35,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870090974] [2021-08-21 17:55:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:35,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:35,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:35,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870090974] [2021-08-21 17:55:35,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870090974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:35,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445439447] [2021-08-21 17:55:35,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:35,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:35,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:35,726 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) [2021-08-21 17:55:35,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 17:55:36,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:55:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:36,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:55:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:36,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445439447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:36,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:36,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:36,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153811767] [2021-08-21 17:55:36,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:36,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:36,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:36,324 INFO L87 Difference]: Start difference. First operand 8586 states and 11113 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-08-21 17:55:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:36,413 INFO L93 Difference]: Finished difference Result 12144 states and 15951 transitions. [2021-08-21 17:55:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-08-21 17:55:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:36,428 INFO L225 Difference]: With dead ends: 12144 [2021-08-21 17:55:36,428 INFO L226 Difference]: Without dead ends: 12144 [2021-08-21 17:55:36,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:55:36,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12144 states. [2021-08-21 17:55:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12144 to 10406. [2021-08-21 17:55:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10406 states, 10405 states have (on average 1.29851033157136) internal successors, (13511), 10405 states have internal predecessors, (13511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:36,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10406 states to 10406 states and 13511 transitions. [2021-08-21 17:55:36,545 INFO L78 Accepts]: Start accepts. Automaton has 10406 states and 13511 transitions. Word has length 46 [2021-08-21 17:55:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:36,545 INFO L470 AbstractCegarLoop]: Abstraction has 10406 states and 13511 transitions. [2021-08-21 17:55:36,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-08-21 17:55:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 10406 states and 13511 transitions. [2021-08-21 17:55:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:36,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:36,556 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:36,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 17:55:36,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:36,769 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash -531248800, now seen corresponding path program 25 times [2021-08-21 17:55:36,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:36,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314025931] [2021-08-21 17:55:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:36,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:36,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:36,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314025931] [2021-08-21 17:55:36,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314025931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:36,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161627518] [2021-08-21 17:55:36,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:36,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:36,812 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) [2021-08-21 17:55:36,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 17:55:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:55:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:37,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161627518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:37,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:37,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:37,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045586549] [2021-08-21 17:55:37,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:37,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:37,365 INFO L87 Difference]: Start difference. First operand 10406 states and 13511 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-08-21 17:55:37,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:37,442 INFO L93 Difference]: Finished difference Result 13878 states and 18073 transitions. [2021-08-21 17:55:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-08-21 17:55:37,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:37,455 INFO L225 Difference]: With dead ends: 13878 [2021-08-21 17:55:37,455 INFO L226 Difference]: Without dead ends: 13878 [2021-08-21 17:55:37,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:55:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13878 states. [2021-08-21 17:55:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13878 to 11366. [2021-08-21 17:55:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 1.2958205015398152) internal successors, (14727), 11365 states have internal predecessors, (14727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 14727 transitions. [2021-08-21 17:55:37,638 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 14727 transitions. Word has length 46 [2021-08-21 17:55:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:37,639 INFO L470 AbstractCegarLoop]: Abstraction has 11366 states and 14727 transitions. [2021-08-21 17:55:37,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-08-21 17:55:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 14727 transitions. [2021-08-21 17:55:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:37,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:37,649 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:37,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:37,867 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:37,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:37,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1498532736, now seen corresponding path program 26 times [2021-08-21 17:55:37,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:37,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032664683] [2021-08-21 17:55:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:37,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:55:37,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:37,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032664683] [2021-08-21 17:55:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032664683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:37,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386220416] [2021-08-21 17:55:37,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:37,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:37,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:37,927 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) [2021-08-21 17:55:37,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 17:55:38,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:38,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:38,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:55:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:55:38,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386220416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:38,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:38,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 17:55:38,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178328502] [2021-08-21 17:55:38,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:55:38,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:55:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:38,505 INFO L87 Difference]: Start difference. First operand 11366 states and 14727 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:38,654 INFO L93 Difference]: Finished difference Result 13012 states and 16623 transitions. [2021-08-21 17:55:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:38,655 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 17:55:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:38,675 INFO L225 Difference]: With dead ends: 13012 [2021-08-21 17:55:38,675 INFO L226 Difference]: Without dead ends: 13012 [2021-08-21 17:55:38,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:55:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13012 states. [2021-08-21 17:55:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13012 to 10430. [2021-08-21 17:55:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10430 states, 10429 states have (on average 1.289385367724614) internal successors, (13447), 10429 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10430 states to 10430 states and 13447 transitions. [2021-08-21 17:55:38,805 INFO L78 Accepts]: Start accepts. Automaton has 10430 states and 13447 transitions. Word has length 46 [2021-08-21 17:55:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:38,805 INFO L470 AbstractCegarLoop]: Abstraction has 10430 states and 13447 transitions. [2021-08-21 17:55:38,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10430 states and 13447 transitions. [2021-08-21 17:55:38,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:38,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:38,815 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:38,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:39,032 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,SelfDestructingSolverStorable34 [2021-08-21 17:55:39,033 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1905846046, now seen corresponding path program 27 times [2021-08-21 17:55:39,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:39,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998481110] [2021-08-21 17:55:39,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:39,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:39,080 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:55:39,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:39,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998481110] [2021-08-21 17:55:39,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998481110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:39,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898807572] [2021-08-21 17:55:39,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:39,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:39,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:39,083 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) [2021-08-21 17:55:39,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 17:55:39,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:55:39,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:55:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:55:39,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898807572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:39,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:39,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:39,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147146031] [2021-08-21 17:55:39,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:39,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:39,670 INFO L87 Difference]: Start difference. First operand 10430 states and 13447 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) [2021-08-21 17:55:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:39,771 INFO L93 Difference]: Finished difference Result 11932 states and 15128 transitions. [2021-08-21 17:55:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:39,771 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 46 [2021-08-21 17:55:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:39,786 INFO L225 Difference]: With dead ends: 11932 [2021-08-21 17:55:39,786 INFO L226 Difference]: Without dead ends: 11932 [2021-08-21 17:55:39,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11932 states. [2021-08-21 17:55:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11932 to 10434. [2021-08-21 17:55:39,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10434 states, 10433 states have (on average 1.288507620051759) internal successors, (13443), 10433 states have internal predecessors, (13443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10434 states to 10434 states and 13443 transitions. [2021-08-21 17:55:39,901 INFO L78 Accepts]: Start accepts. Automaton has 10434 states and 13443 transitions. Word has length 46 [2021-08-21 17:55:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:39,901 INFO L470 AbstractCegarLoop]: Abstraction has 10434 states and 13443 transitions. [2021-08-21 17:55:39,901 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) [2021-08-21 17:55:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 10434 states and 13443 transitions. [2021-08-21 17:55:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:55:39,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:39,911 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:39,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:40,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 17:55:40,128 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:40,129 INFO L82 PathProgramCache]: Analyzing trace with hash 8367680, now seen corresponding path program 28 times [2021-08-21 17:55:40,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:40,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446945470] [2021-08-21 17:55:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:40,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:40,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:40,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446945470] [2021-08-21 17:55:40,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446945470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:40,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344654061] [2021-08-21 17:55:40,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:40,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:40,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:40,185 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) [2021-08-21 17:55:40,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 17:55:40,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:55:40,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 17:55:40,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:40,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344654061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:40,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:40,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 17:55:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700416290] [2021-08-21 17:55:40,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 17:55:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 17:55:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:55:40,835 INFO L87 Difference]: Start difference. First operand 10434 states and 13443 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-08-21 17:55:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:40,946 INFO L93 Difference]: Finished difference Result 13512 states and 17181 transitions. [2021-08-21 17:55:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:55:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-08-21 17:55:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:40,961 INFO L225 Difference]: With dead ends: 13512 [2021-08-21 17:55:40,962 INFO L226 Difference]: Without dead ends: 13512 [2021-08-21 17:55:40,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:55:40,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-08-21 17:55:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 12302. [2021-08-21 17:55:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12302 states, 12301 states have (on average 1.288106657995285) internal successors, (15845), 12301 states have internal predecessors, (15845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12302 states to 12302 states and 15845 transitions. [2021-08-21 17:55:41,126 INFO L78 Accepts]: Start accepts. Automaton has 12302 states and 15845 transitions. Word has length 46 [2021-08-21 17:55:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:41,126 INFO L470 AbstractCegarLoop]: Abstraction has 12302 states and 15845 transitions. [2021-08-21 17:55:41,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-08-21 17:55:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 12302 states and 15845 transitions. [2021-08-21 17:55:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:41,154 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:41,154 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:41,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:41,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:41,355 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:41,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:41,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1017576926, now seen corresponding path program 29 times [2021-08-21 17:55:41,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:41,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969021819] [2021-08-21 17:55:41,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:41,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:41,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:41,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969021819] [2021-08-21 17:55:41,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969021819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:41,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92344733] [2021-08-21 17:55:41,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:41,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:41,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:41,433 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) [2021-08-21 17:55:41,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 17:55:41,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:55:41,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:42,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92344733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:42,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:42,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:55:42,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34811122] [2021-08-21 17:55:42,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:55:42,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:42,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:55:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:55:42,134 INFO L87 Difference]: Start difference. First operand 12302 states and 15845 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:42,307 INFO L93 Difference]: Finished difference Result 21428 states and 26987 transitions. [2021-08-21 17:55:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:55:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:42,336 INFO L225 Difference]: With dead ends: 21428 [2021-08-21 17:55:42,336 INFO L226 Difference]: Without dead ends: 21340 [2021-08-21 17:55:42,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:55:42,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21340 states. [2021-08-21 17:55:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21340 to 19382. [2021-08-21 17:55:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19382 states, 19381 states have (on average 1.2831639234301635) internal successors, (24869), 19381 states have internal predecessors, (24869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19382 states to 19382 states and 24869 transitions. [2021-08-21 17:55:42,687 INFO L78 Accepts]: Start accepts. Automaton has 19382 states and 24869 transitions. Word has length 56 [2021-08-21 17:55:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:42,688 INFO L470 AbstractCegarLoop]: Abstraction has 19382 states and 24869 transitions. [2021-08-21 17:55:42,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 19382 states and 24869 transitions. [2021-08-21 17:55:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:42,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:42,709 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:42,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:42,922 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,SelfDestructingSolverStorable37 [2021-08-21 17:55:42,922 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash -665882296, now seen corresponding path program 30 times [2021-08-21 17:55:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:42,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150602920] [2021-08-21 17:55:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:42,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:42,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:42,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150602920] [2021-08-21 17:55:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150602920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:42,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100195696] [2021-08-21 17:55:42,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:42,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:42,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:42,989 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) [2021-08-21 17:55:42,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 17:55:43,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:55:43,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:43,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:43,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100195696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:43,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:43,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:43,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652627956] [2021-08-21 17:55:43,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:43,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:43,719 INFO L87 Difference]: Start difference. First operand 19382 states and 24869 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:43,852 INFO L93 Difference]: Finished difference Result 21348 states and 26922 transitions. [2021-08-21 17:55:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:55:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:43,875 INFO L225 Difference]: With dead ends: 21348 [2021-08-21 17:55:43,876 INFO L226 Difference]: Without dead ends: 21348 [2021-08-21 17:55:43,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21348 states. [2021-08-21 17:55:44,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21348 to 18062. [2021-08-21 17:55:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18062 states, 18061 states have (on average 1.2821549194396766) internal successors, (23157), 18061 states have internal predecessors, (23157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18062 states to 18062 states and 23157 transitions. [2021-08-21 17:55:44,425 INFO L78 Accepts]: Start accepts. Automaton has 18062 states and 23157 transitions. Word has length 56 [2021-08-21 17:55:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:44,425 INFO L470 AbstractCegarLoop]: Abstraction has 18062 states and 23157 transitions. [2021-08-21 17:55:44,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 18062 states and 23157 transitions. [2021-08-21 17:55:44,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:44,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:44,451 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:44,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:44,667 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,SelfDestructingSolverStorable38 [2021-08-21 17:55:44,667 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1911695132, now seen corresponding path program 31 times [2021-08-21 17:55:44,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:44,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362835582] [2021-08-21 17:55:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:44,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:44,715 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:44,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:44,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362835582] [2021-08-21 17:55:44,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362835582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:44,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494809641] [2021-08-21 17:55:44,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:44,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:44,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:44,717 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) [2021-08-21 17:55:44,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 17:55:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:45,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:45,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494809641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:45,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:45,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:45,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439572075] [2021-08-21 17:55:45,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:45,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:45,481 INFO L87 Difference]: Start difference. First operand 18062 states and 23157 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:45,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:45,595 INFO L93 Difference]: Finished difference Result 21106 states and 26662 transitions. [2021-08-21 17:55:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:55:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:45,621 INFO L225 Difference]: With dead ends: 21106 [2021-08-21 17:55:45,621 INFO L226 Difference]: Without dead ends: 21102 [2021-08-21 17:55:45,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21102 states. [2021-08-21 17:55:45,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21102 to 19762. [2021-08-21 17:55:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19762 states, 19761 states have (on average 1.2791356712716968) internal successors, (25277), 19761 states have internal predecessors, (25277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19762 states to 19762 states and 25277 transitions. [2021-08-21 17:55:45,905 INFO L78 Accepts]: Start accepts. Automaton has 19762 states and 25277 transitions. Word has length 56 [2021-08-21 17:55:45,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:45,907 INFO L470 AbstractCegarLoop]: Abstraction has 19762 states and 25277 transitions. [2021-08-21 17:55:45,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:45,907 INFO L276 IsEmpty]: Start isEmpty. Operand 19762 states and 25277 transitions. [2021-08-21 17:55:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:45,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:45,926 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:45,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 17:55:46,141 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,SelfDestructingSolverStorable39 [2021-08-21 17:55:46,141 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:46,141 INFO L82 PathProgramCache]: Analyzing trace with hash -254056566, now seen corresponding path program 32 times [2021-08-21 17:55:46,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:46,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237588503] [2021-08-21 17:55:46,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:46,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:46,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:46,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237588503] [2021-08-21 17:55:46,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237588503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:46,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819263449] [2021-08-21 17:55:46,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:46,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:46,262 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) [2021-08-21 17:55:46,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 17:55:46,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:46,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:46,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:46,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819263449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:46,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:46,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:46,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983761982] [2021-08-21 17:55:46,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:46,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:46,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:46,939 INFO L87 Difference]: Start difference. First operand 19762 states and 25277 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:47,140 INFO L93 Difference]: Finished difference Result 21098 states and 26624 transitions. [2021-08-21 17:55:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:55:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:47,174 INFO L225 Difference]: With dead ends: 21098 [2021-08-21 17:55:47,175 INFO L226 Difference]: Without dead ends: 21098 [2021-08-21 17:55:47,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21098 states. [2021-08-21 17:55:47,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21098 to 19722. [2021-08-21 17:55:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19722 states, 19721 states have (on average 1.2786876933218396) internal successors, (25217), 19721 states have internal predecessors, (25217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19722 states to 19722 states and 25217 transitions. [2021-08-21 17:55:47,469 INFO L78 Accepts]: Start accepts. Automaton has 19722 states and 25217 transitions. Word has length 56 [2021-08-21 17:55:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:47,469 INFO L470 AbstractCegarLoop]: Abstraction has 19722 states and 25217 transitions. [2021-08-21 17:55:47,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 19722 states and 25217 transitions. [2021-08-21 17:55:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:47,492 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:47,492 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:47,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:47,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:47,715 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:47,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:47,716 INFO L82 PathProgramCache]: Analyzing trace with hash 136147360, now seen corresponding path program 33 times [2021-08-21 17:55:47,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:47,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829647158] [2021-08-21 17:55:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:47,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:47,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829647158] [2021-08-21 17:55:47,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829647158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:47,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370414722] [2021-08-21 17:55:47,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:47,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:47,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:47,777 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) [2021-08-21 17:55:47,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 17:55:48,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:55:48,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:48,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370414722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:48,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:48,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 17:55:48,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964762389] [2021-08-21 17:55:48,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:55:48,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:55:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:48,786 INFO L87 Difference]: Start difference. First operand 19722 states and 25217 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:48,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:48,917 INFO L93 Difference]: Finished difference Result 21394 states and 27248 transitions. [2021-08-21 17:55:48,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:55:48,918 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:48,940 INFO L225 Difference]: With dead ends: 21394 [2021-08-21 17:55:48,940 INFO L226 Difference]: Without dead ends: 21394 [2021-08-21 17:55:48,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:55:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21394 states. [2021-08-21 17:55:49,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21394 to 19826. [2021-08-21 17:55:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19826 states, 19825 states have (on average 1.27843631778058) internal successors, (25345), 19825 states have internal predecessors, (25345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19826 states to 19826 states and 25345 transitions. [2021-08-21 17:55:49,236 INFO L78 Accepts]: Start accepts. Automaton has 19826 states and 25345 transitions. Word has length 56 [2021-08-21 17:55:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:49,236 INFO L470 AbstractCegarLoop]: Abstraction has 19826 states and 25345 transitions. [2021-08-21 17:55:49,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 19826 states and 25345 transitions. [2021-08-21 17:55:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:49,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:49,255 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:49,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:49,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:49,472 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:49,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1861995840, now seen corresponding path program 34 times [2021-08-21 17:55:49,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:49,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552285365] [2021-08-21 17:55:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:49,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:55:49,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:49,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552285365] [2021-08-21 17:55:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552285365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:49,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600094437] [2021-08-21 17:55:49,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:49,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:49,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:49,543 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) [2021-08-21 17:55:49,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 17:55:50,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:55:50,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:50,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:50,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:55:50,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600094437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:50,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:50,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:50,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239879721] [2021-08-21 17:55:50,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:50,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:50,494 INFO L87 Difference]: Start difference. First operand 19826 states and 25345 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-08-21 17:55:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:50,609 INFO L93 Difference]: Finished difference Result 22446 states and 28351 transitions. [2021-08-21 17:55:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:55:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-08-21 17:55:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:50,640 INFO L225 Difference]: With dead ends: 22446 [2021-08-21 17:55:50,640 INFO L226 Difference]: Without dead ends: 22422 [2021-08-21 17:55:50,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:50,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22422 states. [2021-08-21 17:55:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22422 to 19786. [2021-08-21 17:55:50,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19786 states, 19785 states have (on average 1.2767753348496336) internal successors, (25261), 19785 states have internal predecessors, (25261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19786 states to 19786 states and 25261 transitions. [2021-08-21 17:55:50,969 INFO L78 Accepts]: Start accepts. Automaton has 19786 states and 25261 transitions. Word has length 56 [2021-08-21 17:55:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:50,970 INFO L470 AbstractCegarLoop]: Abstraction has 19786 states and 25261 transitions. [2021-08-21 17:55:50,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-08-21 17:55:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand 19786 states and 25261 transitions. [2021-08-21 17:55:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:50,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:50,990 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:51,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:51,192 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,SelfDestructingSolverStorable42 [2021-08-21 17:55:51,193 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 585460130, now seen corresponding path program 35 times [2021-08-21 17:55:51,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:51,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841519836] [2021-08-21 17:55:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:51,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:51,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:51,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841519836] [2021-08-21 17:55:51,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841519836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:51,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211953939] [2021-08-21 17:55:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:55:51,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:51,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:51,272 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) [2021-08-21 17:55:51,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 17:55:52,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:55:52,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:52,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:52,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:52,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211953939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:52,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:52,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:52,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148390435] [2021-08-21 17:55:52,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:52,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:52,168 INFO L87 Difference]: Start difference. First operand 19786 states and 25261 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:52,287 INFO L93 Difference]: Finished difference Result 22656 states and 28602 transitions. [2021-08-21 17:55:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:55:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:52,319 INFO L225 Difference]: With dead ends: 22656 [2021-08-21 17:55:52,319 INFO L226 Difference]: Without dead ends: 22652 [2021-08-21 17:55:52,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22652 states. [2021-08-21 17:55:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22652 to 20186. [2021-08-21 17:55:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20186 states, 20185 states have (on average 1.2750557344562794) internal successors, (25737), 20185 states have internal predecessors, (25737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20186 states to 20186 states and 25737 transitions. [2021-08-21 17:55:52,601 INFO L78 Accepts]: Start accepts. Automaton has 20186 states and 25737 transitions. Word has length 56 [2021-08-21 17:55:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:52,601 INFO L470 AbstractCegarLoop]: Abstraction has 20186 states and 25737 transitions. [2021-08-21 17:55:52,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 20186 states and 25737 transitions. [2021-08-21 17:55:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:52,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:52,618 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:52,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 17:55:52,835 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,SelfDestructingSolverStorable43 [2021-08-21 17:55:52,836 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:52,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2051868600, now seen corresponding path program 36 times [2021-08-21 17:55:52,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:52,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024591919] [2021-08-21 17:55:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:52,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:52,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:52,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024591919] [2021-08-21 17:55:52,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024591919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:52,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928478844] [2021-08-21 17:55:52,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:55:52,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:52,897 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) [2021-08-21 17:55:52,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 17:55:53,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:55:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:53,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928478844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:53,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:53,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:55:53,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423878781] [2021-08-21 17:55:53,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:55:53,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:55:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:55:53,832 INFO L87 Difference]: Start difference. First operand 20186 states and 25737 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:53,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:53,934 INFO L93 Difference]: Finished difference Result 21094 states and 26725 transitions. [2021-08-21 17:55:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:55:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:53,957 INFO L225 Difference]: With dead ends: 21094 [2021-08-21 17:55:53,957 INFO L226 Difference]: Without dead ends: 21094 [2021-08-21 17:55:53,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:55:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21094 states. [2021-08-21 17:55:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21094 to 20186. [2021-08-21 17:55:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20186 states, 20185 states have (on average 1.2748575675006193) internal successors, (25733), 20185 states have internal predecessors, (25733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20186 states to 20186 states and 25733 transitions. [2021-08-21 17:55:54,345 INFO L78 Accepts]: Start accepts. Automaton has 20186 states and 25733 transitions. Word has length 56 [2021-08-21 17:55:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:54,346 INFO L470 AbstractCegarLoop]: Abstraction has 20186 states and 25733 transitions. [2021-08-21 17:55:54,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 20186 states and 25733 transitions. [2021-08-21 17:55:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:54,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:54,366 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:54,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:54,587 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,SelfDestructingSolverStorable44 [2021-08-21 17:55:54,587 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1661664674, now seen corresponding path program 37 times [2021-08-21 17:55:54,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:54,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225310293] [2021-08-21 17:55:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:54,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:54,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:54,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225310293] [2021-08-21 17:55:54,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225310293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:54,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347222469] [2021-08-21 17:55:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:54,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:54,647 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) [2021-08-21 17:55:54,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 17:55:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:55:55,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347222469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:55,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:55,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 17:55:55,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076982065] [2021-08-21 17:55:55,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:55:55,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:55:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:55,559 INFO L87 Difference]: Start difference. First operand 20186 states and 25733 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:55,761 INFO L93 Difference]: Finished difference Result 21022 states and 26582 transitions. [2021-08-21 17:55:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:55:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:55,782 INFO L225 Difference]: With dead ends: 21022 [2021-08-21 17:55:55,782 INFO L226 Difference]: Without dead ends: 21022 [2021-08-21 17:55:55,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:55:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21022 states. [2021-08-21 17:55:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21022 to 19978. [2021-08-21 17:55:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19978 states, 19977 states have (on average 1.2749161535766131) internal successors, (25469), 19977 states have internal predecessors, (25469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:56,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19978 states to 19978 states and 25469 transitions. [2021-08-21 17:55:56,002 INFO L78 Accepts]: Start accepts. Automaton has 19978 states and 25469 transitions. Word has length 56 [2021-08-21 17:55:56,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:56,002 INFO L470 AbstractCegarLoop]: Abstraction has 19978 states and 25469 transitions. [2021-08-21 17:55:56,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:56,002 INFO L276 IsEmpty]: Start isEmpty. Operand 19978 states and 25469 transitions. [2021-08-21 17:55:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:56,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:56,019 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:56,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:56,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 17:55:56,237 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash -208799744, now seen corresponding path program 38 times [2021-08-21 17:55:56,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:56,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729525289] [2021-08-21 17:55:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:56,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:56,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:56,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729525289] [2021-08-21 17:55:56,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729525289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:56,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677712416] [2021-08-21 17:55:56,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:56,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:56,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:56,293 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) [2021-08-21 17:55:56,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 17:55:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:57,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:57,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677712416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:57,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:57,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:55:57,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282195084] [2021-08-21 17:55:57,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:55:57,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:55:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:55:57,178 INFO L87 Difference]: Start difference. First operand 19978 states and 25469 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:57,323 INFO L93 Difference]: Finished difference Result 21166 states and 27030 transitions. [2021-08-21 17:55:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:55:57,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:57,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:57,354 INFO L225 Difference]: With dead ends: 21166 [2021-08-21 17:55:57,354 INFO L226 Difference]: Without dead ends: 21166 [2021-08-21 17:55:57,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:55:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21166 states. [2021-08-21 17:55:57,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21166 to 18658. [2021-08-21 17:55:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18658 states, 18657 states have (on average 1.2746422254381733) internal successors, (23781), 18657 states have internal predecessors, (23781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:57,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18658 states to 18658 states and 23781 transitions. [2021-08-21 17:55:57,596 INFO L78 Accepts]: Start accepts. Automaton has 18658 states and 23781 transitions. Word has length 56 [2021-08-21 17:55:57,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:57,596 INFO L470 AbstractCegarLoop]: Abstraction has 18658 states and 23781 transitions. [2021-08-21 17:55:57,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 18658 states and 23781 transitions. [2021-08-21 17:55:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:57,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:57,619 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:57,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 17:55:57,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:57,844 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1650570532, now seen corresponding path program 39 times [2021-08-21 17:55:57,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:57,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30531842] [2021-08-21 17:55:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:57,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 17:55:57,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:57,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30531842] [2021-08-21 17:55:57,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30531842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:57,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664475206] [2021-08-21 17:55:57,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:55:57,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:57,972 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) [2021-08-21 17:55:57,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 17:55:58,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:55:58,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:58,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:55:58,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 17:55:58,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664475206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:58,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:58,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 17:55:58,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030360286] [2021-08-21 17:55:58,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:55:58,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:55:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:55:58,781 INFO L87 Difference]: Start difference. First operand 18658 states and 23781 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-08-21 17:55:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:58,891 INFO L93 Difference]: Finished difference Result 20832 states and 26344 transitions. [2021-08-21 17:55:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:55:58,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 56 [2021-08-21 17:55:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:58,915 INFO L225 Difference]: With dead ends: 20832 [2021-08-21 17:55:58,915 INFO L226 Difference]: Without dead ends: 20788 [2021-08-21 17:55:58,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:55:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20788 states. [2021-08-21 17:55:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20788 to 20062. [2021-08-21 17:55:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20062 states, 20061 states have (on average 1.2739644085539106) internal successors, (25557), 20061 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20062 states to 20062 states and 25557 transitions. [2021-08-21 17:55:59,229 INFO L78 Accepts]: Start accepts. Automaton has 20062 states and 25557 transitions. Word has length 56 [2021-08-21 17:55:59,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:59,229 INFO L470 AbstractCegarLoop]: Abstraction has 20062 states and 25557 transitions. [2021-08-21 17:55:59,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-08-21 17:55:59,229 INFO L276 IsEmpty]: Start isEmpty. Operand 20062 states and 25557 transitions. [2021-08-21 17:55:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:59,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:59,246 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:59,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:59,465 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,SelfDestructingSolverStorable47 [2021-08-21 17:55:59,465 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1747311712, now seen corresponding path program 40 times [2021-08-21 17:55:59,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:59,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138701819] [2021-08-21 17:55:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:59,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:55:59,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:59,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138701819] [2021-08-21 17:55:59,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138701819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:59,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470755899] [2021-08-21 17:55:59,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:55:59,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:59,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:59,519 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) [2021-08-21 17:55:59,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 17:56:00,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:56:00,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:56:00,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470755899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:00,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:00,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:56:00,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22278126] [2021-08-21 17:56:00,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:56:00,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:00,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:56:00,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:56:00,462 INFO L87 Difference]: Start difference. First operand 20062 states and 25557 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-08-21 17:56:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:00,586 INFO L93 Difference]: Finished difference Result 21844 states and 27719 transitions. [2021-08-21 17:56:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:56:00,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-08-21 17:56:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:00,612 INFO L225 Difference]: With dead ends: 21844 [2021-08-21 17:56:00,613 INFO L226 Difference]: Without dead ends: 21820 [2021-08-21 17:56:00,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:56:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21820 states. [2021-08-21 17:56:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21820 to 21466. [2021-08-21 17:56:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21466 states, 21465 states have (on average 1.2733752620545074) internal successors, (27333), 21465 states have internal predecessors, (27333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21466 states to 21466 states and 27333 transitions. [2021-08-21 17:56:00,952 INFO L78 Accepts]: Start accepts. Automaton has 21466 states and 27333 transitions. Word has length 56 [2021-08-21 17:56:00,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:00,952 INFO L470 AbstractCegarLoop]: Abstraction has 21466 states and 27333 transitions. [2021-08-21 17:56:00,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-08-21 17:56:00,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21466 states and 27333 transitions. [2021-08-21 17:56:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:00,969 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:00,969 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:00,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:01,187 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,SelfDestructingSolverStorable48 [2021-08-21 17:56:01,187 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2064923492, now seen corresponding path program 41 times [2021-08-21 17:56:01,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:01,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163662663] [2021-08-21 17:56:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:01,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:01,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:01,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163662663] [2021-08-21 17:56:01,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163662663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:01,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131967306] [2021-08-21 17:56:01,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:56:01,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:01,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:01,236 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) [2021-08-21 17:56:01,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 17:56:01,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:56:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:01,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:02,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131967306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:02,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:02,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:56:02,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057789644] [2021-08-21 17:56:02,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:56:02,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:02,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:56:02,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:56:02,152 INFO L87 Difference]: Start difference. First operand 21466 states and 27333 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:02,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:02,256 INFO L93 Difference]: Finished difference Result 24016 states and 30360 transitions. [2021-08-21 17:56:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:56:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:02,282 INFO L225 Difference]: With dead ends: 24016 [2021-08-21 17:56:02,283 INFO L226 Difference]: Without dead ends: 24008 [2021-08-21 17:56:02,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:56:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24008 states. [2021-08-21 17:56:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24008 to 21866. [2021-08-21 17:56:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21866 states, 21865 states have (on average 1.2718499885662018) internal successors, (27809), 21865 states have internal predecessors, (27809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21866 states to 21866 states and 27809 transitions. [2021-08-21 17:56:02,511 INFO L78 Accepts]: Start accepts. Automaton has 21866 states and 27809 transitions. Word has length 56 [2021-08-21 17:56:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:02,511 INFO L470 AbstractCegarLoop]: Abstraction has 21866 states and 27809 transitions. [2021-08-21 17:56:02,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21866 states and 27809 transitions. [2021-08-21 17:56:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:02,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:02,528 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:02,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:02,746 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,SelfDestructingSolverStorable49 [2021-08-21 17:56:02,746 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:02,746 INFO L82 PathProgramCache]: Analyzing trace with hash -572405238, now seen corresponding path program 42 times [2021-08-21 17:56:02,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:02,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541211694] [2021-08-21 17:56:02,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:02,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:02,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:02,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541211694] [2021-08-21 17:56:02,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541211694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:02,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413726536] [2021-08-21 17:56:02,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:56:02,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:02,793 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) [2021-08-21 17:56:02,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 17:56:03,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:56:03,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:03,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:03,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413726536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:03,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:03,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 17:56:03,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943861734] [2021-08-21 17:56:03,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:56:03,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:56:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:56:03,736 INFO L87 Difference]: Start difference. First operand 21866 states and 27809 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:03,838 INFO L93 Difference]: Finished difference Result 22438 states and 28469 transitions. [2021-08-21 17:56:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:56:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:03,863 INFO L225 Difference]: With dead ends: 22438 [2021-08-21 17:56:03,863 INFO L226 Difference]: Without dead ends: 22438 [2021-08-21 17:56:03,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:56:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22438 states. [2021-08-21 17:56:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22438 to 21870. [2021-08-21 17:56:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21870 states, 21869 states have (on average 1.2719831725273218) internal successors, (27817), 21869 states have internal predecessors, (27817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21870 states to 21870 states and 27817 transitions. [2021-08-21 17:56:04,084 INFO L78 Accepts]: Start accepts. Automaton has 21870 states and 27817 transitions. Word has length 56 [2021-08-21 17:56:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:04,085 INFO L470 AbstractCegarLoop]: Abstraction has 21870 states and 27817 transitions. [2021-08-21 17:56:04,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 21870 states and 27817 transitions. [2021-08-21 17:56:04,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:04,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:04,103 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:04,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:04,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:04,321 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash -182201312, now seen corresponding path program 43 times [2021-08-21 17:56:04,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:04,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819114938] [2021-08-21 17:56:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:04,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:04,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:04,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819114938] [2021-08-21 17:56:04,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819114938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:04,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995294700] [2021-08-21 17:56:04,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:56:04,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:04,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:04,370 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) [2021-08-21 17:56:04,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 17:56:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:05,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:05,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995294700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:05,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:05,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 17:56:05,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986145794] [2021-08-21 17:56:05,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:56:05,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:56:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:56:05,349 INFO L87 Difference]: Start difference. First operand 21870 states and 27817 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:05,487 INFO L93 Difference]: Finished difference Result 22522 states and 28633 transitions. [2021-08-21 17:56:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:56:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:05,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:05,517 INFO L225 Difference]: With dead ends: 22522 [2021-08-21 17:56:05,517 INFO L226 Difference]: Without dead ends: 22522 [2021-08-21 17:56:05,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:56:05,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22522 states. [2021-08-21 17:56:05,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22522 to 21866. [2021-08-21 17:56:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21866 states, 21865 states have (on average 1.271667047793277) internal successors, (27805), 21865 states have internal predecessors, (27805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21866 states to 21866 states and 27805 transitions. [2021-08-21 17:56:05,749 INFO L78 Accepts]: Start accepts. Automaton has 21866 states and 27805 transitions. Word has length 56 [2021-08-21 17:56:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:05,749 INFO L470 AbstractCegarLoop]: Abstraction has 21866 states and 27805 transitions. [2021-08-21 17:56:05,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21866 states and 27805 transitions. [2021-08-21 17:56:05,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:05,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:05,766 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:05,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 17:56:05,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:05,974 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:05,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:05,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1270663618, now seen corresponding path program 44 times [2021-08-21 17:56:05,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:05,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313190611] [2021-08-21 17:56:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:05,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:05,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:06,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:06,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313190611] [2021-08-21 17:56:06,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313190611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:06,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178401235] [2021-08-21 17:56:06,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:56:06,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:06,041 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) [2021-08-21 17:56:06,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 17:56:06,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:56:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:06,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:07,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178401235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:07,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:07,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:07,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433410408] [2021-08-21 17:56:07,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:07,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:07,066 INFO L87 Difference]: Start difference. First operand 21866 states and 27805 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:07,224 INFO L93 Difference]: Finished difference Result 22358 states and 28306 transitions. [2021-08-21 17:56:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:56:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:07,252 INFO L225 Difference]: With dead ends: 22358 [2021-08-21 17:56:07,252 INFO L226 Difference]: Without dead ends: 22358 [2021-08-21 17:56:07,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22358 states. [2021-08-21 17:56:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22358 to 21618. [2021-08-21 17:56:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21618 states, 21617 states have (on average 1.2703427857704583) internal successors, (27461), 21617 states have internal predecessors, (27461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:07,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21618 states to 21618 states and 27461 transitions. [2021-08-21 17:56:07,489 INFO L78 Accepts]: Start accepts. Automaton has 21618 states and 27461 transitions. Word has length 56 [2021-08-21 17:56:07,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:07,489 INFO L470 AbstractCegarLoop]: Abstraction has 21618 states and 27461 transitions. [2021-08-21 17:56:07,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 21618 states and 27461 transitions. [2021-08-21 17:56:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:07,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:07,507 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:07,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:07,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:07,725 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:07,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:07,725 INFO L82 PathProgramCache]: Analyzing trace with hash -590807648, now seen corresponding path program 45 times [2021-08-21 17:56:07,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:07,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244894766] [2021-08-21 17:56:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:07,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:07,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:07,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244894766] [2021-08-21 17:56:07,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244894766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:07,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245274025] [2021-08-21 17:56:07,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:56:07,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:07,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:07,799 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) [2021-08-21 17:56:07,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 17:56:08,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 17:56:08,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:08,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:08,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:08,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245274025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:08,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:08,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:56:08,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855087837] [2021-08-21 17:56:08,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:56:08,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:08,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:56:08,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:56:08,750 INFO L87 Difference]: Start difference. First operand 21618 states and 27461 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:08,905 INFO L93 Difference]: Finished difference Result 22366 states and 28482 transitions. [2021-08-21 17:56:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:56:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:08,930 INFO L225 Difference]: With dead ends: 22366 [2021-08-21 17:56:08,930 INFO L226 Difference]: Without dead ends: 22366 [2021-08-21 17:56:08,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:56:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22366 states. [2021-08-21 17:56:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22366 to 21762. [2021-08-21 17:56:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21762 states, 21761 states have (on average 1.2714948761545886) internal successors, (27669), 21761 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21762 states to 21762 states and 27669 transitions. [2021-08-21 17:56:09,148 INFO L78 Accepts]: Start accepts. Automaton has 21762 states and 27669 transitions. Word has length 56 [2021-08-21 17:56:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:09,148 INFO L470 AbstractCegarLoop]: Abstraction has 21762 states and 27669 transitions. [2021-08-21 17:56:09,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21762 states and 27669 transitions. [2021-08-21 17:56:09,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:09,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:09,165 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:09,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:09,372 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,SelfDestructingSolverStorable53 [2021-08-21 17:56:09,372 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1008580224, now seen corresponding path program 46 times [2021-08-21 17:56:09,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:09,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075714921] [2021-08-21 17:56:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:09,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:09,430 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:56:09,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:09,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075714921] [2021-08-21 17:56:09,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075714921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:09,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233028125] [2021-08-21 17:56:09,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:56:09,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:09,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:09,431 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) [2021-08-21 17:56:09,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 17:56:10,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:56:10,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:56:10,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233028125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:10,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:10,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:56:10,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018261724] [2021-08-21 17:56:10,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:56:10,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:56:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:56:10,321 INFO L87 Difference]: Start difference. First operand 21762 states and 27669 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:10,466 INFO L93 Difference]: Finished difference Result 23416 states and 29345 transitions. [2021-08-21 17:56:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:56:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:10,496 INFO L225 Difference]: With dead ends: 23416 [2021-08-21 17:56:10,496 INFO L226 Difference]: Without dead ends: 23352 [2021-08-21 17:56:10,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:56:10,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-08-21 17:56:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20334. [2021-08-21 17:56:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20334 states, 20333 states have (on average 1.2712831357891112) internal successors, (25849), 20333 states have internal predecessors, (25849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20334 states to 20334 states and 25849 transitions. [2021-08-21 17:56:10,778 INFO L78 Accepts]: Start accepts. Automaton has 20334 states and 25849 transitions. Word has length 56 [2021-08-21 17:56:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:10,778 INFO L470 AbstractCegarLoop]: Abstraction has 20334 states and 25849 transitions. [2021-08-21 17:56:10,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 20334 states and 25849 transitions. [2021-08-21 17:56:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:10,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:10,797 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:10,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:11,012 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,SelfDestructingSolverStorable54 [2021-08-21 17:56:11,013 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:11,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1539100318, now seen corresponding path program 47 times [2021-08-21 17:56:11,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:11,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036681620] [2021-08-21 17:56:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:11,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:56:11,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:11,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036681620] [2021-08-21 17:56:11,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036681620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:11,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782812673] [2021-08-21 17:56:11,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:56:11,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:11,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:11,075 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) [2021-08-21 17:56:11,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 17:56:11,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:56:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 17:56:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 17:56:12,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782812673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:12,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:12,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:12,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126788240] [2021-08-21 17:56:12,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:12,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:12,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:12,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:12,054 INFO L87 Difference]: Start difference. First operand 20334 states and 25849 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:12,188 INFO L93 Difference]: Finished difference Result 21104 states and 26632 transitions. [2021-08-21 17:56:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:56:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:12,215 INFO L225 Difference]: With dead ends: 21104 [2021-08-21 17:56:12,215 INFO L226 Difference]: Without dead ends: 21060 [2021-08-21 17:56:12,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:56:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21060 states. [2021-08-21 17:56:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21060 to 20334. [2021-08-21 17:56:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20334 states, 20333 states have (on average 1.2708896867161756) internal successors, (25841), 20333 states have internal predecessors, (25841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20334 states to 20334 states and 25841 transitions. [2021-08-21 17:56:12,490 INFO L78 Accepts]: Start accepts. Automaton has 20334 states and 25841 transitions. Word has length 56 [2021-08-21 17:56:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:12,490 INFO L470 AbstractCegarLoop]: Abstraction has 20334 states and 25841 transitions. [2021-08-21 17:56:12,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20334 states and 25841 transitions. [2021-08-21 17:56:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:56:12,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:12,510 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:12,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:12,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 17:56:12,728 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:12,728 INFO L82 PathProgramCache]: Analyzing trace with hash 543107392, now seen corresponding path program 48 times [2021-08-21 17:56:12,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:12,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13361178] [2021-08-21 17:56:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:12,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:56:12,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:12,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13361178] [2021-08-21 17:56:12,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13361178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:12,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652672941] [2021-08-21 17:56:12,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:56:12,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:12,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:12,797 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) [2021-08-21 17:56:12,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 17:56:13,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:56:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 17:56:13,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-21 17:56:13,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652672941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:13,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:13,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 17:56:13,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41709566] [2021-08-21 17:56:13,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:56:13,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:13,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:56:13,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:56:13,871 INFO L87 Difference]: Start difference. First operand 20334 states and 25841 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:14,513 INFO L93 Difference]: Finished difference Result 50710 states and 63296 transitions. [2021-08-21 17:56:14,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 17:56:14,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:56:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:14,605 INFO L225 Difference]: With dead ends: 50710 [2021-08-21 17:56:14,606 INFO L226 Difference]: Without dead ends: 50576 [2021-08-21 17:56:14,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=352, Invalid=2300, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:56:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50576 states. [2021-08-21 17:56:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50576 to 33478. [2021-08-21 17:56:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33478 states, 33477 states have (on average 1.284852286644562) internal successors, (43013), 33477 states have internal predecessors, (43013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33478 states to 33478 states and 43013 transitions. [2021-08-21 17:56:15,119 INFO L78 Accepts]: Start accepts. Automaton has 33478 states and 43013 transitions. Word has length 56 [2021-08-21 17:56:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:15,119 INFO L470 AbstractCegarLoop]: Abstraction has 33478 states and 43013 transitions. [2021-08-21 17:56:15,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 33478 states and 43013 transitions. [2021-08-21 17:56:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 17:56:15,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:15,158 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:15,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 17:56:15,373 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,SelfDestructingSolverStorable56 [2021-08-21 17:56:15,373 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash 817341538, now seen corresponding path program 49 times [2021-08-21 17:56:15,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:15,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559509216] [2021-08-21 17:56:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:15,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 105 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:15,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:15,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559509216] [2021-08-21 17:56:15,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559509216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:15,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212782957] [2021-08-21 17:56:15,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:56:15,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:15,447 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) [2021-08-21 17:56:15,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 17:56:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:16,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-21 17:56:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 82 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:16,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212782957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:16,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:16,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 14 [2021-08-21 17:56:16,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682365178] [2021-08-21 17:56:16,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:56:16,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:16,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:56:16,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:56:16,520 INFO L87 Difference]: Start difference. First operand 33478 states and 43013 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:16,786 INFO L93 Difference]: Finished difference Result 40942 states and 52242 transitions. [2021-08-21 17:56:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:56:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 17:56:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:16,845 INFO L225 Difference]: With dead ends: 40942 [2021-08-21 17:56:16,845 INFO L226 Difference]: Without dead ends: 40942 [2021-08-21 17:56:16,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:56:16,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40942 states. [2021-08-21 17:56:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40942 to 38122. [2021-08-21 17:56:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38122 states, 38121 states have (on average 1.283308412685921) internal successors, (48921), 38121 states have internal predecessors, (48921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38122 states to 38122 states and 48921 transitions. [2021-08-21 17:56:17,334 INFO L78 Accepts]: Start accepts. Automaton has 38122 states and 48921 transitions. Word has length 66 [2021-08-21 17:56:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:17,335 INFO L470 AbstractCegarLoop]: Abstraction has 38122 states and 48921 transitions. [2021-08-21 17:56:17,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 38122 states and 48921 transitions. [2021-08-21 17:56:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:17,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:17,382 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:17,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:17,601 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,SelfDestructingSolverStorable57 [2021-08-21 17:56:17,601 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:17,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:17,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1099101122, now seen corresponding path program 50 times [2021-08-21 17:56:17,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:17,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532825369] [2021-08-21 17:56:17,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:17,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:17,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:17,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532825369] [2021-08-21 17:56:17,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532825369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:17,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157927667] [2021-08-21 17:56:17,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:56:17,706 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:17,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:17,706 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) [2021-08-21 17:56:17,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 17:56:18,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:56:18,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:18,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:18,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:18,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157927667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:18,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:18,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 17:56:18,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936799633] [2021-08-21 17:56:18,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:56:18,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:56:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:56:18,771 INFO L87 Difference]: Start difference. First operand 38122 states and 48921 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:19,582 INFO L93 Difference]: Finished difference Result 56264 states and 71103 transitions. [2021-08-21 17:56:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:56:19,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:19,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:19,675 INFO L225 Difference]: With dead ends: 56264 [2021-08-21 17:56:19,675 INFO L226 Difference]: Without dead ends: 56144 [2021-08-21 17:56:19,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:56:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56144 states. [2021-08-21 17:56:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56144 to 52242. [2021-08-21 17:56:20,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52242 states, 52241 states have (on average 1.281885875078961) internal successors, (66967), 52241 states have internal predecessors, (66967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:20,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52242 states to 52242 states and 66967 transitions. [2021-08-21 17:56:20,749 INFO L78 Accepts]: Start accepts. Automaton has 52242 states and 66967 transitions. Word has length 76 [2021-08-21 17:56:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:20,749 INFO L470 AbstractCegarLoop]: Abstraction has 52242 states and 66967 transitions. [2021-08-21 17:56:20,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 52242 states and 66967 transitions. [2021-08-21 17:56:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:20,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:20,828 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:20,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:21,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 17:56:21,038 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:21,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1955079384, now seen corresponding path program 51 times [2021-08-21 17:56:21,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:21,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992648645] [2021-08-21 17:56:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:21,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:21,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:21,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992648645] [2021-08-21 17:56:21,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992648645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:21,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382691544] [2021-08-21 17:56:21,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:56:21,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:21,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:21,293 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) [2021-08-21 17:56:21,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 17:56:22,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 17:56:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:22,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382691544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:22,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:22,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:22,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61065544] [2021-08-21 17:56:22,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:22,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:22,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:22,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:22,447 INFO L87 Difference]: Start difference. First operand 52242 states and 66967 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:22,687 INFO L93 Difference]: Finished difference Result 56132 states and 71054 transitions. [2021-08-21 17:56:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:56:22,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:22,779 INFO L225 Difference]: With dead ends: 56132 [2021-08-21 17:56:22,780 INFO L226 Difference]: Without dead ends: 56132 [2021-08-21 17:56:22,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:22,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56132 states. [2021-08-21 17:56:23,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56132 to 49982. [2021-08-21 17:56:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49982 states, 49981 states have (on average 1.2803865468878173) internal successors, (63995), 49981 states have internal predecessors, (63995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49982 states to 49982 states and 63995 transitions. [2021-08-21 17:56:23,543 INFO L78 Accepts]: Start accepts. Automaton has 49982 states and 63995 transitions. Word has length 76 [2021-08-21 17:56:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:23,544 INFO L470 AbstractCegarLoop]: Abstraction has 49982 states and 63995 transitions. [2021-08-21 17:56:23,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 49982 states and 63995 transitions. [2021-08-21 17:56:23,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:23,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:23,598 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:23,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:23,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:23,813 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash 311725636, now seen corresponding path program 52 times [2021-08-21 17:56:23,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:23,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454958434] [2021-08-21 17:56:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:23,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:23,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:23,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454958434] [2021-08-21 17:56:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454958434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:23,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662482683] [2021-08-21 17:56:23,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:56:23,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:23,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:23,887 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) [2021-08-21 17:56:23,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 17:56:25,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:56:25,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:25,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662482683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:25,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:25,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:25,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105747036] [2021-08-21 17:56:25,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:25,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:25,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:25,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:25,220 INFO L87 Difference]: Start difference. First operand 49982 states and 63995 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:25,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:25,463 INFO L93 Difference]: Finished difference Result 57430 states and 72688 transitions. [2021-08-21 17:56:25,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:56:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:25,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:25,564 INFO L225 Difference]: With dead ends: 57430 [2021-08-21 17:56:25,564 INFO L226 Difference]: Without dead ends: 57426 [2021-08-21 17:56:25,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57426 states. [2021-08-21 17:56:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57426 to 54282. [2021-08-21 17:56:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54282 states, 54281 states have (on average 1.2797664007663823) internal successors, (69467), 54281 states have internal predecessors, (69467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54282 states to 54282 states and 69467 transitions. [2021-08-21 17:56:26,382 INFO L78 Accepts]: Start accepts. Automaton has 54282 states and 69467 transitions. Word has length 76 [2021-08-21 17:56:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:26,382 INFO L470 AbstractCegarLoop]: Abstraction has 54282 states and 69467 transitions. [2021-08-21 17:56:26,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 54282 states and 69467 transitions. [2021-08-21 17:56:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:26,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:26,451 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:26,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:26,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:26,665 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:26,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:26,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1969364202, now seen corresponding path program 53 times [2021-08-21 17:56:26,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:26,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201998340] [2021-08-21 17:56:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:26,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:26,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:26,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201998340] [2021-08-21 17:56:26,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201998340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:26,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056118327] [2021-08-21 17:56:26,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:56:26,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:26,761 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) [2021-08-21 17:56:26,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 17:56:28,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 17:56:28,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:28,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:28,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056118327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:28,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:28,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:28,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138242859] [2021-08-21 17:56:28,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:28,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:28,183 INFO L87 Difference]: Start difference. First operand 54282 states and 69467 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:28,419 INFO L93 Difference]: Finished difference Result 57422 states and 72674 transitions. [2021-08-21 17:56:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:56:28,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:28,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:28,510 INFO L225 Difference]: With dead ends: 57422 [2021-08-21 17:56:28,510 INFO L226 Difference]: Without dead ends: 57422 [2021-08-21 17:56:28,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57422 states. [2021-08-21 17:56:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57422 to 54262. [2021-08-21 17:56:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54262 states, 54261 states have (on average 1.2797220840014005) internal successors, (69439), 54261 states have internal predecessors, (69439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54262 states to 54262 states and 69439 transitions. [2021-08-21 17:56:29,739 INFO L78 Accepts]: Start accepts. Automaton has 54262 states and 69439 transitions. Word has length 76 [2021-08-21 17:56:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:29,739 INFO L470 AbstractCegarLoop]: Abstraction has 54262 states and 69439 transitions. [2021-08-21 17:56:29,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 54262 states and 69439 transitions. [2021-08-21 17:56:29,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:29,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:29,800 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:29,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:30,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:30,017 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1935399168, now seen corresponding path program 54 times [2021-08-21 17:56:30,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:30,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200276966] [2021-08-21 17:56:30,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:30,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:30,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200276966] [2021-08-21 17:56:30,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200276966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:30,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603389581] [2021-08-21 17:56:30,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:56:30,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:30,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:30,079 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) [2021-08-21 17:56:30,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 17:56:31,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:56:31,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:31,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:31,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:31,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603389581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:31,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:31,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:56:31,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987951270] [2021-08-21 17:56:31,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:56:31,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:56:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:56:31,520 INFO L87 Difference]: Start difference. First operand 54262 states and 69439 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:31,782 INFO L93 Difference]: Finished difference Result 58166 states and 74178 transitions. [2021-08-21 17:56:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:56:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:31,865 INFO L225 Difference]: With dead ends: 58166 [2021-08-21 17:56:31,865 INFO L226 Difference]: Without dead ends: 58166 [2021-08-21 17:56:31,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:56:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58166 states. [2021-08-21 17:56:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58166 to 54366. [2021-08-21 17:56:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54366 states, 54365 states have (on average 1.2796284374137772) internal successors, (69567), 54365 states have internal predecessors, (69567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54366 states to 54366 states and 69567 transitions. [2021-08-21 17:56:32,734 INFO L78 Accepts]: Start accepts. Automaton has 54366 states and 69567 transitions. Word has length 76 [2021-08-21 17:56:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:32,734 INFO L470 AbstractCegarLoop]: Abstraction has 54366 states and 69567 transitions. [2021-08-21 17:56:32,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 54366 states and 69567 transitions. [2021-08-21 17:56:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:32,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:32,947 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:32,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:33,167 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,SelfDestructingSolverStorable62 [2021-08-21 17:56:33,168 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1105417184, now seen corresponding path program 55 times [2021-08-21 17:56:33,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:33,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330151211] [2021-08-21 17:56:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:33,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:56:33,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:33,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330151211] [2021-08-21 17:56:33,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330151211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:33,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074792798] [2021-08-21 17:56:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:56:33,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:33,271 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) [2021-08-21 17:56:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 17:56:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:34,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:56:34,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074792798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:34,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:34,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:34,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017772989] [2021-08-21 17:56:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:34,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:34,490 INFO L87 Difference]: Start difference. First operand 54366 states and 69567 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:56:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:34,781 INFO L93 Difference]: Finished difference Result 63048 states and 79853 transitions. [2021-08-21 17:56:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:56:34,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-08-21 17:56:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:34,880 INFO L225 Difference]: With dead ends: 63048 [2021-08-21 17:56:34,880 INFO L226 Difference]: Without dead ends: 63024 [2021-08-21 17:56:34,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63024 states. [2021-08-21 17:56:35,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63024 to 57990. [2021-08-21 17:56:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57990 states, 57989 states have (on average 1.2802255600200039) internal successors, (74239), 57989 states have internal predecessors, (74239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57990 states to 57990 states and 74239 transitions. [2021-08-21 17:56:35,903 INFO L78 Accepts]: Start accepts. Automaton has 57990 states and 74239 transitions. Word has length 76 [2021-08-21 17:56:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:35,903 INFO L470 AbstractCegarLoop]: Abstraction has 57990 states and 74239 transitions. [2021-08-21 17:56:35,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:56:35,903 INFO L276 IsEmpty]: Start isEmpty. Operand 57990 states and 74239 transitions. [2021-08-21 17:56:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:35,990 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:35,990 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:36,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:36,210 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,SelfDestructingSolverStorable63 [2021-08-21 17:56:36,210 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:36,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1913014402, now seen corresponding path program 56 times [2021-08-21 17:56:36,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:36,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440470525] [2021-08-21 17:56:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:36,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:36,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:36,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440470525] [2021-08-21 17:56:36,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440470525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:36,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668843806] [2021-08-21 17:56:36,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:56:36,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:36,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:36,329 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) [2021-08-21 17:56:36,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 17:56:37,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:56:37,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:37,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:37,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668843806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:37,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:37,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:37,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573480109] [2021-08-21 17:56:37,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:37,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:38,008 INFO L87 Difference]: Start difference. First operand 57990 states and 74239 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:38,311 INFO L93 Difference]: Finished difference Result 65586 states and 83126 transitions. [2021-08-21 17:56:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:56:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:38,418 INFO L225 Difference]: With dead ends: 65586 [2021-08-21 17:56:38,418 INFO L226 Difference]: Without dead ends: 65582 [2021-08-21 17:56:38,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65582 states. [2021-08-21 17:56:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65582 to 60510. [2021-08-21 17:56:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60510 states, 60509 states have (on average 1.2789998182088615) internal successors, (77391), 60509 states have internal predecessors, (77391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:39,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60510 states to 60510 states and 77391 transitions. [2021-08-21 17:56:39,498 INFO L78 Accepts]: Start accepts. Automaton has 60510 states and 77391 transitions. Word has length 76 [2021-08-21 17:56:39,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:39,498 INFO L470 AbstractCegarLoop]: Abstraction has 60510 states and 77391 transitions. [2021-08-21 17:56:39,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 60510 states and 77391 transitions. [2021-08-21 17:56:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:39,574 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:39,575 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:39,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:39,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:39,794 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:39,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:39,794 INFO L82 PathProgramCache]: Analyzing trace with hash -724314328, now seen corresponding path program 57 times [2021-08-21 17:56:39,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:39,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155934204] [2021-08-21 17:56:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:39,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:39,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:39,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155934204] [2021-08-21 17:56:39,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155934204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:39,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872585815] [2021-08-21 17:56:39,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:56:39,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:39,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:39,881 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) [2021-08-21 17:56:39,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 17:56:41,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:56:41,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:41,698 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:41,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872585815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:41,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:41,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:41,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984623615] [2021-08-21 17:56:41,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:41,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:41,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:41,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:41,699 INFO L87 Difference]: Start difference. First operand 60510 states and 77391 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:41,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:41,948 INFO L93 Difference]: Finished difference Result 63266 states and 80359 transitions. [2021-08-21 17:56:41,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:56:41,948 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:41,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:42,052 INFO L225 Difference]: With dead ends: 63266 [2021-08-21 17:56:42,052 INFO L226 Difference]: Without dead ends: 63266 [2021-08-21 17:56:42,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63266 states. [2021-08-21 17:56:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63266 to 60510. [2021-08-21 17:56:42,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60510 states, 60509 states have (on average 1.2789998182088615) internal successors, (77391), 60509 states have internal predecessors, (77391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:43,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60510 states to 60510 states and 77391 transitions. [2021-08-21 17:56:43,006 INFO L78 Accepts]: Start accepts. Automaton has 60510 states and 77391 transitions. Word has length 76 [2021-08-21 17:56:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 60510 states and 77391 transitions. [2021-08-21 17:56:43,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60510 states and 77391 transitions. [2021-08-21 17:56:43,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:43,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:43,077 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:43,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:43,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:43,297 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:43,298 INFO L82 PathProgramCache]: Analyzing trace with hash -334110402, now seen corresponding path program 58 times [2021-08-21 17:56:43,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:43,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090822828] [2021-08-21 17:56:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:43,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:43,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:43,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090822828] [2021-08-21 17:56:43,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090822828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:43,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597453551] [2021-08-21 17:56:43,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:56:43,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:43,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:43,410 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) [2021-08-21 17:56:43,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 17:56:44,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:56:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:45,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597453551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:45,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:45,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:56:45,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120168569] [2021-08-21 17:56:45,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:56:45,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:45,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:56:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:56:45,051 INFO L87 Difference]: Start difference. First operand 60510 states and 77391 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:45,326 INFO L93 Difference]: Finished difference Result 63110 states and 80048 transitions. [2021-08-21 17:56:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:56:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:45,433 INFO L225 Difference]: With dead ends: 63110 [2021-08-21 17:56:45,433 INFO L226 Difference]: Without dead ends: 63110 [2021-08-21 17:56:45,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:56:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63110 states. [2021-08-21 17:56:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63110 to 60302. [2021-08-21 17:56:46,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60302 states, 60301 states have (on average 1.2790335151987529) internal successors, (77127), 60301 states have internal predecessors, (77127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60302 states to 60302 states and 77127 transitions. [2021-08-21 17:56:46,500 INFO L78 Accepts]: Start accepts. Automaton has 60302 states and 77127 transitions. Word has length 76 [2021-08-21 17:56:46,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:46,500 INFO L470 AbstractCegarLoop]: Abstraction has 60302 states and 77127 transitions. [2021-08-21 17:56:46,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 60302 states and 77127 transitions. [2021-08-21 17:56:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:46,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:46,568 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:46,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-21 17:56:46,788 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,SelfDestructingSolverStorable66 [2021-08-21 17:56:46,788 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:46,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:46,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1118754528, now seen corresponding path program 59 times [2021-08-21 17:56:46,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:46,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401812926] [2021-08-21 17:56:46,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:46,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:46,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:46,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401812926] [2021-08-21 17:56:46,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401812926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:46,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169816660] [2021-08-21 17:56:46,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:56:46,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:46,858 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) [2021-08-21 17:56:46,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 17:56:48,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 17:56:48,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:48,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:48,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169816660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:48,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:48,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:56:48,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008375634] [2021-08-21 17:56:48,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:56:48,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:48,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:56:48,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:56:48,449 INFO L87 Difference]: Start difference. First operand 60302 states and 77127 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:48,809 INFO L93 Difference]: Finished difference Result 64046 states and 82080 transitions. [2021-08-21 17:56:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:56:48,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:48,912 INFO L225 Difference]: With dead ends: 64046 [2021-08-21 17:56:48,913 INFO L226 Difference]: Without dead ends: 64046 [2021-08-21 17:56:48,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 92.0ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:56:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64046 states. [2021-08-21 17:56:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64046 to 60550. [2021-08-21 17:56:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60550 states, 60549 states have (on average 1.2793440023782392) internal successors, (77463), 60549 states have internal predecessors, (77463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60550 states to 60550 states and 77463 transitions. [2021-08-21 17:56:50,096 INFO L78 Accepts]: Start accepts. Automaton has 60550 states and 77463 transitions. Word has length 76 [2021-08-21 17:56:50,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:50,097 INFO L470 AbstractCegarLoop]: Abstraction has 60550 states and 77463 transitions. [2021-08-21 17:56:50,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:50,097 INFO L276 IsEmpty]: Start isEmpty. Operand 60550 states and 77463 transitions. [2021-08-21 17:56:50,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:50,180 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:50,180 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:50,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 17:56:50,405 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,SelfDestructingSolverStorable67 [2021-08-21 17:56:50,405 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash 537209280, now seen corresponding path program 60 times [2021-08-21 17:56:50,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:50,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980146788] [2021-08-21 17:56:50,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:50,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:56:50,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:50,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980146788] [2021-08-21 17:56:50,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980146788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:50,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423979084] [2021-08-21 17:56:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:56:50,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:50,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:50,462 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) [2021-08-21 17:56:50,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 17:56:51,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:56:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:51,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:56:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423979084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:51,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:51,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:51,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678528778] [2021-08-21 17:56:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:51,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:51,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:51,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:51,960 INFO L87 Difference]: Start difference. First operand 60550 states and 77463 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:56:52,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:52,312 INFO L93 Difference]: Finished difference Result 67236 states and 85289 transitions. [2021-08-21 17:56:52,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:56:52,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-08-21 17:56:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:52,426 INFO L225 Difference]: With dead ends: 67236 [2021-08-21 17:56:52,426 INFO L226 Difference]: Without dead ends: 67212 [2021-08-21 17:56:52,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67212 states. [2021-08-21 17:56:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67212 to 62794. [2021-08-21 17:56:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62794 states, 62793 states have (on average 1.2787253356265826) internal successors, (80295), 62793 states have internal predecessors, (80295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62794 states to 62794 states and 80295 transitions. [2021-08-21 17:56:53,391 INFO L78 Accepts]: Start accepts. Automaton has 62794 states and 80295 transitions. Word has length 76 [2021-08-21 17:56:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:53,392 INFO L470 AbstractCegarLoop]: Abstraction has 62794 states and 80295 transitions. [2021-08-21 17:56:53,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:56:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 62794 states and 80295 transitions. [2021-08-21 17:56:53,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:53,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:53,472 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:53,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:53,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:53,693 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 854821060, now seen corresponding path program 61 times [2021-08-21 17:56:53,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:53,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608997767] [2021-08-21 17:56:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:53,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:53,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:53,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608997767] [2021-08-21 17:56:53,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608997767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:53,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074666936] [2021-08-21 17:56:53,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:56:53,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:53,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:54,025 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) [2021-08-21 17:56:54,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 17:56:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:55,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:55,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074666936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:55,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:55,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:55,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533869647] [2021-08-21 17:56:55,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:55,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:55,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:55,515 INFO L87 Difference]: Start difference. First operand 62794 states and 80295 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:55,768 INFO L93 Difference]: Finished difference Result 71010 states and 90014 transitions. [2021-08-21 17:56:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:56:55,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:55,876 INFO L225 Difference]: With dead ends: 71010 [2021-08-21 17:56:55,877 INFO L226 Difference]: Without dead ends: 71002 [2021-08-21 17:56:55,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71002 states. [2021-08-21 17:56:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71002 to 66154. [2021-08-21 17:56:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66154 states, 66153 states have (on average 1.277024473568848) internal successors, (84479), 66153 states have internal predecessors, (84479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66154 states to 66154 states and 84479 transitions. [2021-08-21 17:56:57,047 INFO L78 Accepts]: Start accepts. Automaton has 66154 states and 84479 transitions. Word has length 76 [2021-08-21 17:56:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:57,047 INFO L470 AbstractCegarLoop]: Abstraction has 66154 states and 84479 transitions. [2021-08-21 17:56:57,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 66154 states and 84479 transitions. [2021-08-21 17:56:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:56:57,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:57,146 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:57,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:57,355 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,SelfDestructingSolverStorable69 [2021-08-21 17:56:57,356 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1782507670, now seen corresponding path program 62 times [2021-08-21 17:56:57,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:57,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479180501] [2021-08-21 17:56:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:57,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:57,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:57,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479180501] [2021-08-21 17:56:57,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479180501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:57,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321279222] [2021-08-21 17:56:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:56:57,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:57,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:57,430 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) [2021-08-21 17:56:57,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 17:56:58,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:56:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:58,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:56:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:56:59,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321279222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:59,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:59,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:56:59,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940923247] [2021-08-21 17:56:59,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:56:59,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:56:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:56:59,124 INFO L87 Difference]: Start difference. First operand 66154 states and 84479 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:59,371 INFO L93 Difference]: Finished difference Result 68822 states and 87513 transitions. [2021-08-21 17:56:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:56:59,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:56:59,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:59,474 INFO L225 Difference]: With dead ends: 68822 [2021-08-21 17:56:59,474 INFO L226 Difference]: Without dead ends: 68822 [2021-08-21 17:56:59,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:56:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68822 states. [2021-08-21 17:57:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68822 to 66154. [2021-08-21 17:57:00,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66154 states, 66153 states have (on average 1.276964007679168) internal successors, (84475), 66153 states have internal predecessors, (84475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:00,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66154 states to 66154 states and 84475 transitions. [2021-08-21 17:57:00,627 INFO L78 Accepts]: Start accepts. Automaton has 66154 states and 84475 transitions. Word has length 76 [2021-08-21 17:57:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:00,628 INFO L470 AbstractCegarLoop]: Abstraction has 66154 states and 84475 transitions. [2021-08-21 17:57:00,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 66154 states and 84475 transitions. [2021-08-21 17:57:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:00,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:00,706 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:00,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:00,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:00,924 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:00,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1392303744, now seen corresponding path program 63 times [2021-08-21 17:57:00,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:00,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472963824] [2021-08-21 17:57:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:00,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:00,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472963824] [2021-08-21 17:57:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472963824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690781842] [2021-08-21 17:57:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:00,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:00,995 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) [2021-08-21 17:57:00,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 17:57:02,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 17:57:02,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:02,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:02,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690781842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:02,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:02,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:57:02,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846996666] [2021-08-21 17:57:02,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:57:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:57:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:57:02,544 INFO L87 Difference]: Start difference. First operand 66154 states and 84475 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:02,915 INFO L93 Difference]: Finished difference Result 69274 states and 88417 transitions. [2021-08-21 17:57:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:03,025 INFO L225 Difference]: With dead ends: 69274 [2021-08-21 17:57:03,026 INFO L226 Difference]: Without dead ends: 69274 [2021-08-21 17:57:03,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:57:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69274 states. [2021-08-21 17:57:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69274 to 66154. [2021-08-21 17:57:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66154 states, 66153 states have (on average 1.276964007679168) internal successors, (84475), 66153 states have internal predecessors, (84475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66154 states to 66154 states and 84475 transitions. [2021-08-21 17:57:04,365 INFO L78 Accepts]: Start accepts. Automaton has 66154 states and 84475 transitions. Word has length 76 [2021-08-21 17:57:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 66154 states and 84475 transitions. [2021-08-21 17:57:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 66154 states and 84475 transitions. [2021-08-21 17:57:04,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:04,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:04,450 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:04,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:04,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:04,665 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:04,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:04,665 INFO L82 PathProgramCache]: Analyzing trace with hash 60561186, now seen corresponding path program 64 times [2021-08-21 17:57:04,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:04,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019704323] [2021-08-21 17:57:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:04,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:04,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:04,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019704323] [2021-08-21 17:57:04,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019704323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:04,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82445487] [2021-08-21 17:57:04,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:57:04,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:04,743 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) [2021-08-21 17:57:04,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 17:57:06,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:57:06,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:06,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:06,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:06,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82445487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:06,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:06,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:57:06,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145321368] [2021-08-21 17:57:06,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:57:06,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:06,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:57:06,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:06,334 INFO L87 Difference]: Start difference. First operand 66154 states and 84475 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:06,711 INFO L93 Difference]: Finished difference Result 68510 states and 86886 transitions. [2021-08-21 17:57:06,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:57:06,712 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:06,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:06,993 INFO L225 Difference]: With dead ends: 68510 [2021-08-21 17:57:06,993 INFO L226 Difference]: Without dead ends: 68510 [2021-08-21 17:57:06,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:57:07,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68510 states. [2021-08-21 17:57:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68510 to 65782. [2021-08-21 17:57:07,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65782 states, 65781 states have (on average 1.2763411927456256) internal successors, (83959), 65781 states have internal predecessors, (83959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:07,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65782 states to 65782 states and 83959 transitions. [2021-08-21 17:57:07,908 INFO L78 Accepts]: Start accepts. Automaton has 65782 states and 83959 transitions. Word has length 76 [2021-08-21 17:57:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:07,908 INFO L470 AbstractCegarLoop]: Abstraction has 65782 states and 83959 transitions. [2021-08-21 17:57:07,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 65782 states and 83959 transitions. [2021-08-21 17:57:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:07,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:07,991 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:08,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:08,204 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,SelfDestructingSolverStorable72 [2021-08-21 17:57:08,205 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:08,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:08,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1800910080, now seen corresponding path program 65 times [2021-08-21 17:57:08,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:08,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902304527] [2021-08-21 17:57:08,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:08,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:08,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:08,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902304527] [2021-08-21 17:57:08,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902304527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:08,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372407193] [2021-08-21 17:57:08,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:57:08,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:08,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:08,325 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) [2021-08-21 17:57:08,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 17:57:10,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 17:57:10,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:10,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:10,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:10,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372407193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:10,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:10,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 17:57:10,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619765885] [2021-08-21 17:57:10,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:57:10,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:10,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:57:10,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:57:10,318 INFO L87 Difference]: Start difference. First operand 65782 states and 83959 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:10,616 INFO L93 Difference]: Finished difference Result 69610 states and 89326 transitions. [2021-08-21 17:57:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:10,716 INFO L225 Difference]: With dead ends: 69610 [2021-08-21 17:57:10,716 INFO L226 Difference]: Without dead ends: 69610 [2021-08-21 17:57:10,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:57:10,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69610 states. [2021-08-21 17:57:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69610 to 66214. [2021-08-21 17:57:11,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66214 states, 66213 states have (on average 1.2774379653542356) internal successors, (84583), 66213 states have internal predecessors, (84583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66214 states to 66214 states and 84583 transitions. [2021-08-21 17:57:11,760 INFO L78 Accepts]: Start accepts. Automaton has 66214 states and 84583 transitions. Word has length 76 [2021-08-21 17:57:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:11,760 INFO L470 AbstractCegarLoop]: Abstraction has 66214 states and 84583 transitions. [2021-08-21 17:57:11,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 66214 states and 84583 transitions. [2021-08-21 17:57:11,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:11,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:11,833 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:11,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:12,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:12,052 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:12,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1118650336, now seen corresponding path program 66 times [2021-08-21 17:57:12,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:12,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938512785] [2021-08-21 17:57:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:12,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:57:12,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:12,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938512785] [2021-08-21 17:57:12,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938512785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:12,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580876466] [2021-08-21 17:57:12,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:57:12,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:12,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:12,108 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) [2021-08-21 17:57:12,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 17:57:13,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 17:57:13,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:13,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:57:14,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580876466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:14,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:14,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:57:14,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032508451] [2021-08-21 17:57:14,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:57:14,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:57:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:57:14,046 INFO L87 Difference]: Start difference. First operand 66214 states and 84583 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:57:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:14,323 INFO L93 Difference]: Finished difference Result 72276 states and 91781 transitions. [2021-08-21 17:57:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:57:14,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-08-21 17:57:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:14,440 INFO L225 Difference]: With dead ends: 72276 [2021-08-21 17:57:14,441 INFO L226 Difference]: Without dead ends: 72228 [2021-08-21 17:57:14,441 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72228 states. [2021-08-21 17:57:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72228 to 63770. [2021-08-21 17:57:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63770 states, 63769 states have (on average 1.2770938857438567) internal successors, (81439), 63769 states have internal predecessors, (81439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63770 states to 63770 states and 81439 transitions. [2021-08-21 17:57:15,738 INFO L78 Accepts]: Start accepts. Automaton has 63770 states and 81439 transitions. Word has length 76 [2021-08-21 17:57:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:15,738 INFO L470 AbstractCegarLoop]: Abstraction has 63770 states and 81439 transitions. [2021-08-21 17:57:15,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:57:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 63770 states and 81439 transitions. [2021-08-21 17:57:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:15,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:15,799 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:15,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:16,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:16,018 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash -228061822, now seen corresponding path program 67 times [2021-08-21 17:57:16,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:16,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076056715] [2021-08-21 17:57:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:16,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:16,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:16,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076056715] [2021-08-21 17:57:16,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076056715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:16,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991168021] [2021-08-21 17:57:16,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:57:16,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:16,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:16,075 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) [2021-08-21 17:57:16,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 17:57:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:17,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991168021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:17,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:17,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:57:17,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750300290] [2021-08-21 17:57:17,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:57:17,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:17,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:57:17,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:57:17,779 INFO L87 Difference]: Start difference. First operand 63770 states and 81439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:18,187 INFO L93 Difference]: Finished difference Result 68814 states and 87436 transitions. [2021-08-21 17:57:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:18,305 INFO L225 Difference]: With dead ends: 68814 [2021-08-21 17:57:18,305 INFO L226 Difference]: Without dead ends: 68806 [2021-08-21 17:57:18,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68806 states. [2021-08-21 17:57:19,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68806 to 65210. [2021-08-21 17:57:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65210 states, 65209 states have (on average 1.2760048459568465) internal successors, (83207), 65209 states have internal predecessors, (83207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65210 states to 65210 states and 83207 transitions. [2021-08-21 17:57:19,214 INFO L78 Accepts]: Start accepts. Automaton has 65210 states and 83207 transitions. Word has length 76 [2021-08-21 17:57:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:19,214 INFO L470 AbstractCegarLoop]: Abstraction has 65210 states and 83207 transitions. [2021-08-21 17:57:19,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:19,214 INFO L276 IsEmpty]: Start isEmpty. Operand 65210 states and 83207 transitions. [2021-08-21 17:57:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:19,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:19,291 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:19,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:19,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:19,512 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:19,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1429576744, now seen corresponding path program 68 times [2021-08-21 17:57:19,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:19,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919754656] [2021-08-21 17:57:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:19,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:19,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:19,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919754656] [2021-08-21 17:57:19,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919754656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:19,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823149656] [2021-08-21 17:57:19,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:19,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:19,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:19,580 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) [2021-08-21 17:57:19,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 17:57:21,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:21,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:21,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:21,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823149656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:21,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:21,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:57:21,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629632905] [2021-08-21 17:57:21,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:57:21,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:57:21,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:57:21,567 INFO L87 Difference]: Start difference. First operand 65210 states and 83207 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:21,872 INFO L93 Difference]: Finished difference Result 66568 states and 84841 transitions. [2021-08-21 17:57:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:57:21,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:21,985 INFO L225 Difference]: With dead ends: 66568 [2021-08-21 17:57:21,985 INFO L226 Difference]: Without dead ends: 66568 [2021-08-21 17:57:21,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66568 states. [2021-08-21 17:57:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66568 to 65210. [2021-08-21 17:57:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65210 states, 65209 states have (on average 1.2760048459568465) internal successors, (83207), 65209 states have internal predecessors, (83207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65210 states to 65210 states and 83207 transitions. [2021-08-21 17:57:23,024 INFO L78 Accepts]: Start accepts. Automaton has 65210 states and 83207 transitions. Word has length 76 [2021-08-21 17:57:23,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:23,024 INFO L470 AbstractCegarLoop]: Abstraction has 65210 states and 83207 transitions. [2021-08-21 17:57:23,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:23,024 INFO L276 IsEmpty]: Start isEmpty. Operand 65210 states and 83207 transitions. [2021-08-21 17:57:23,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:23,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:23,092 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:23,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:23,313 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,SelfDestructingSolverStorable76 [2021-08-21 17:57:23,313 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1819780670, now seen corresponding path program 69 times [2021-08-21 17:57:23,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:23,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674490644] [2021-08-21 17:57:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:23,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:23,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:23,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674490644] [2021-08-21 17:57:23,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674490644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:23,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495451059] [2021-08-21 17:57:23,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:23,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:23,401 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) [2021-08-21 17:57:23,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 17:57:24,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 17:57:24,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:24,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:25,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495451059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:25,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:25,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:57:25,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514100756] [2021-08-21 17:57:25,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:57:25,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:57:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:57:25,136 INFO L87 Difference]: Start difference. First operand 65210 states and 83207 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:25,477 INFO L93 Difference]: Finished difference Result 67100 states and 85905 transitions. [2021-08-21 17:57:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:57:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:25,579 INFO L225 Difference]: With dead ends: 67100 [2021-08-21 17:57:25,579 INFO L226 Difference]: Without dead ends: 67100 [2021-08-21 17:57:25,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:57:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67100 states. [2021-08-21 17:57:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67100 to 65210. [2021-08-21 17:57:26,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65210 states, 65209 states have (on average 1.2760048459568465) internal successors, (83207), 65209 states have internal predecessors, (83207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65210 states to 65210 states and 83207 transitions. [2021-08-21 17:57:26,417 INFO L78 Accepts]: Start accepts. Automaton has 65210 states and 83207 transitions. Word has length 76 [2021-08-21 17:57:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 65210 states and 83207 transitions. [2021-08-21 17:57:26,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 65210 states and 83207 transitions. [2021-08-21 17:57:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:26,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:26,699 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:26,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:26,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:26,925 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:26,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1022321696, now seen corresponding path program 70 times [2021-08-21 17:57:26,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:26,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344084745] [2021-08-21 17:57:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:26,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:26,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:26,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344084745] [2021-08-21 17:57:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344084745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:26,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56744262] [2021-08-21 17:57:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:57:26,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:26,996 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) [2021-08-21 17:57:26,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 17:57:28,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:57:28,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:28,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:28,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:28,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56744262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:28,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:28,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:57:28,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101083043] [2021-08-21 17:57:28,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:57:28,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:28,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:57:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:28,687 INFO L87 Difference]: Start difference. First operand 65210 states and 83207 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:28,988 INFO L93 Difference]: Finished difference Result 66944 states and 85593 transitions. [2021-08-21 17:57:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:57:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:29,097 INFO L225 Difference]: With dead ends: 66944 [2021-08-21 17:57:29,097 INFO L226 Difference]: Without dead ends: 66944 [2021-08-21 17:57:29,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:57:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66944 states. [2021-08-21 17:57:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66944 to 65210. [2021-08-21 17:57:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65210 states, 65209 states have (on average 1.2760048459568465) internal successors, (83207), 65209 states have internal predecessors, (83207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65210 states to 65210 states and 83207 transitions. [2021-08-21 17:57:29,978 INFO L78 Accepts]: Start accepts. Automaton has 65210 states and 83207 transitions. Word has length 76 [2021-08-21 17:57:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:29,978 INFO L470 AbstractCegarLoop]: Abstraction has 65210 states and 83207 transitions. [2021-08-21 17:57:29,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 65210 states and 83207 transitions. [2021-08-21 17:57:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:30,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:30,050 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:30,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:30,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:30,270 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1411174334, now seen corresponding path program 71 times [2021-08-21 17:57:30,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:30,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429041083] [2021-08-21 17:57:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:30,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:30,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:30,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429041083] [2021-08-21 17:57:30,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429041083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:30,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035110419] [2021-08-21 17:57:30,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:57:30,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:30,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:30,346 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) [2021-08-21 17:57:30,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 17:57:32,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 17:57:32,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:32,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:32,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035110419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:32,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:32,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 17:57:32,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267869546] [2021-08-21 17:57:32,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:57:32,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:32,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:57:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:57:32,355 INFO L87 Difference]: Start difference. First operand 65210 states and 83207 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:32,652 INFO L93 Difference]: Finished difference Result 66316 states and 84338 transitions. [2021-08-21 17:57:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:57:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:32,753 INFO L225 Difference]: With dead ends: 66316 [2021-08-21 17:57:32,754 INFO L226 Difference]: Without dead ends: 66316 [2021-08-21 17:57:32,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:57:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66316 states. [2021-08-21 17:57:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66316 to 64922. [2021-08-21 17:57:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64922 states, 64921 states have (on average 1.2751343941097641) internal successors, (82783), 64921 states have internal predecessors, (82783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64922 states to 64922 states and 82783 transitions. [2021-08-21 17:57:33,855 INFO L78 Accepts]: Start accepts. Automaton has 64922 states and 82783 transitions. Word has length 76 [2021-08-21 17:57:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:33,855 INFO L470 AbstractCegarLoop]: Abstraction has 64922 states and 82783 transitions. [2021-08-21 17:57:33,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 64922 states and 82783 transitions. [2021-08-21 17:57:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:33,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:33,930 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:33,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:34,149 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,SelfDestructingSolverStorable79 [2021-08-21 17:57:34,149 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:34,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1686151904, now seen corresponding path program 72 times [2021-08-21 17:57:34,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:34,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239267334] [2021-08-21 17:57:34,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:34,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:34,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:34,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239267334] [2021-08-21 17:57:34,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239267334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:34,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744933778] [2021-08-21 17:57:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:57:34,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:34,240 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) [2021-08-21 17:57:34,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 17:57:35,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 17:57:35,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:35,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:35,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:36,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744933778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:36,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:36,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 17:57:36,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666505409] [2021-08-21 17:57:36,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:57:36,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:57:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:57:36,156 INFO L87 Difference]: Start difference. First operand 64922 states and 82783 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:36,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:36,605 INFO L93 Difference]: Finished difference Result 66868 states and 85602 transitions. [2021-08-21 17:57:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:36,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:36,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:36,716 INFO L225 Difference]: With dead ends: 66868 [2021-08-21 17:57:36,717 INFO L226 Difference]: Without dead ends: 66868 [2021-08-21 17:57:36,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:57:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66868 states. [2021-08-21 17:57:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66868 to 65250. [2021-08-21 17:57:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65250 states, 65249 states have (on average 1.2763260739628193) internal successors, (83279), 65249 states have internal predecessors, (83279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65250 states to 65250 states and 83279 transitions. [2021-08-21 17:57:37,691 INFO L78 Accepts]: Start accepts. Automaton has 65250 states and 83279 transitions. Word has length 76 [2021-08-21 17:57:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:37,691 INFO L470 AbstractCegarLoop]: Abstraction has 65250 states and 83279 transitions. [2021-08-21 17:57:37,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 65250 states and 83279 transitions. [2021-08-21 17:57:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:38,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:38,048 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:38,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:38,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:38,265 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1338488516, now seen corresponding path program 73 times [2021-08-21 17:57:38,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:38,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513493731] [2021-08-21 17:57:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:38,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 17:57:38,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:38,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513493731] [2021-08-21 17:57:38,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513493731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:38,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036022822] [2021-08-21 17:57:38,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:57:38,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:38,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:38,343 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) [2021-08-21 17:57:38,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 17:57:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:39,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:39,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 17:57:40,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036022822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:40,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:40,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 17:57:40,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584995750] [2021-08-21 17:57:40,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:57:40,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:40,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:57:40,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:57:40,045 INFO L87 Difference]: Start difference. First operand 65250 states and 83279 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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) [2021-08-21 17:57:40,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:40,419 INFO L93 Difference]: Finished difference Result 77412 states and 97696 transitions. [2021-08-21 17:57:40,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:57:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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 76 [2021-08-21 17:57:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:40,534 INFO L225 Difference]: With dead ends: 77412 [2021-08-21 17:57:40,534 INFO L226 Difference]: Without dead ends: 77328 [2021-08-21 17:57:40,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:57:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77328 states. [2021-08-21 17:57:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77328 to 71338. [2021-08-21 17:57:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71338 states, 71337 states have (on average 1.2736027587367005) internal successors, (90855), 71337 states have internal predecessors, (90855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71338 states to 71338 states and 90855 transitions. [2021-08-21 17:57:41,497 INFO L78 Accepts]: Start accepts. Automaton has 71338 states and 90855 transitions. Word has length 76 [2021-08-21 17:57:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:41,497 INFO L470 AbstractCegarLoop]: Abstraction has 71338 states and 90855 transitions. [2021-08-21 17:57:41,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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) [2021-08-21 17:57:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 71338 states and 90855 transitions. [2021-08-21 17:57:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:41,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:41,805 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:41,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:42,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:42,025 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash 582782080, now seen corresponding path program 74 times [2021-08-21 17:57:42,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:42,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724092381] [2021-08-21 17:57:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:42,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 17:57:42,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:42,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724092381] [2021-08-21 17:57:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724092381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:42,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189072895] [2021-08-21 17:57:42,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:42,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:42,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:42,149 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) [2021-08-21 17:57:42,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 17:57:43,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:43,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:43,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 17:57:43,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189072895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:43,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:43,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:57:43,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992392306] [2021-08-21 17:57:43,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:57:43,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:43,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:57:43,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:57:43,906 INFO L87 Difference]: Start difference. First operand 71338 states and 90855 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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) [2021-08-21 17:57:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:44,188 INFO L93 Difference]: Finished difference Result 73200 states and 92749 transitions. [2021-08-21 17:57:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:57:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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 76 [2021-08-21 17:57:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:44,386 INFO L225 Difference]: With dead ends: 73200 [2021-08-21 17:57:44,386 INFO L226 Difference]: Without dead ends: 73136 [2021-08-21 17:57:44,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:57:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73136 states. [2021-08-21 17:57:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73136 to 71338. [2021-08-21 17:57:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71338 states, 71337 states have (on average 1.2734906149683896) internal successors, (90847), 71337 states have internal predecessors, (90847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71338 states to 71338 states and 90847 transitions. [2021-08-21 17:57:45,292 INFO L78 Accepts]: Start accepts. Automaton has 71338 states and 90847 transitions. Word has length 76 [2021-08-21 17:57:45,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:45,292 INFO L470 AbstractCegarLoop]: Abstraction has 71338 states and 90847 transitions. [2021-08-21 17:57:45,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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) [2021-08-21 17:57:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 71338 states and 90847 transitions. [2021-08-21 17:57:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:45,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:45,365 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:45,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:45,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:45,582 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash 582821124, now seen corresponding path program 75 times [2021-08-21 17:57:45,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:45,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677184492] [2021-08-21 17:57:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:45,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 17:57:45,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:45,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677184492] [2021-08-21 17:57:45,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677184492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:45,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216074166] [2021-08-21 17:57:45,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:45,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:45,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:45,901 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) [2021-08-21 17:57:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 17:57:47,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 17:57:47,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:47,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 17:57:47,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216074166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:47,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:47,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 17:57:47,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114123660] [2021-08-21 17:57:47,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 17:57:47,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 17:57:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:57:47,695 INFO L87 Difference]: Start difference. First operand 71338 states and 90847 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-08-21 17:57:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:47,936 INFO L93 Difference]: Finished difference Result 72364 states and 91888 transitions. [2021-08-21 17:57:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:57:47,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 76 [2021-08-21 17:57:47,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:48,048 INFO L225 Difference]: With dead ends: 72364 [2021-08-21 17:57:48,048 INFO L226 Difference]: Without dead ends: 72320 [2021-08-21 17:57:48,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:57:48,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72320 states. [2021-08-21 17:57:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72320 to 71338. [2021-08-21 17:57:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71338 states, 71337 states have (on average 1.2733784712000784) internal successors, (90839), 71337 states have internal predecessors, (90839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71338 states to 71338 states and 90839 transitions. [2021-08-21 17:57:49,070 INFO L78 Accepts]: Start accepts. Automaton has 71338 states and 90839 transitions. Word has length 76 [2021-08-21 17:57:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:49,070 INFO L470 AbstractCegarLoop]: Abstraction has 71338 states and 90839 transitions. [2021-08-21 17:57:49,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-08-21 17:57:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71338 states and 90839 transitions. [2021-08-21 17:57:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:49,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:49,145 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:49,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 17:57:49,360 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,SelfDestructingSolverStorable83 [2021-08-21 17:57:49,361 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1754090048, now seen corresponding path program 76 times [2021-08-21 17:57:49,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:49,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574315902] [2021-08-21 17:57:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:49,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:57:49,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:49,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574315902] [2021-08-21 17:57:49,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574315902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:49,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088183323] [2021-08-21 17:57:49,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:57:49,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:49,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:49,422 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) [2021-08-21 17:57:49,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 17:57:51,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:57:51,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:51,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:51,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:57:51,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088183323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:51,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:51,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:57:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647811925] [2021-08-21 17:57:51,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:57:51,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:57:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:57:51,579 INFO L87 Difference]: Start difference. First operand 71338 states and 90839 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:57:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:51,844 INFO L93 Difference]: Finished difference Result 75302 states and 95687 transitions. [2021-08-21 17:57:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:57:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-08-21 17:57:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:51,962 INFO L225 Difference]: With dead ends: 75302 [2021-08-21 17:57:51,962 INFO L226 Difference]: Without dead ends: 75278 [2021-08-21 17:57:51,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:57:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75278 states. [2021-08-21 17:57:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75278 to 74602. [2021-08-21 17:57:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74602 states, 74601 states have (on average 1.2731598772134423) internal successors, (94979), 74601 states have internal predecessors, (94979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74602 states to 74602 states and 94979 transitions. [2021-08-21 17:57:53,235 INFO L78 Accepts]: Start accepts. Automaton has 74602 states and 94979 transitions. Word has length 76 [2021-08-21 17:57:53,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:53,236 INFO L470 AbstractCegarLoop]: Abstraction has 74602 states and 94979 transitions. [2021-08-21 17:57:53,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-08-21 17:57:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 74602 states and 94979 transitions. [2021-08-21 17:57:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:53,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:53,317 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:53,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:53,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:53,539 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1095015612, now seen corresponding path program 77 times [2021-08-21 17:57:53,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:53,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490256319] [2021-08-21 17:57:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:53,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:53,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490256319] [2021-08-21 17:57:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490256319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675018974] [2021-08-21 17:57:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:57:53,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:53,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:53,613 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) [2021-08-21 17:57:53,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 17:57:55,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 17:57:55,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:57:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 128 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:55,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675018974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:55,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:55,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 17:57:55,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541639828] [2021-08-21 17:57:55,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:57:55,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:55,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:57:55,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:57:55,866 INFO L87 Difference]: Start difference. First operand 74602 states and 94979 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:56,138 INFO L93 Difference]: Finished difference Result 79766 states and 101074 transitions. [2021-08-21 17:57:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:57:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:56,258 INFO L225 Difference]: With dead ends: 79766 [2021-08-21 17:57:56,259 INFO L226 Difference]: Without dead ends: 79758 [2021-08-21 17:57:56,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79758 states. [2021-08-21 17:57:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79758 to 73962. [2021-08-21 17:57:57,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73962 states, 73961 states have (on average 1.2732521193602033) internal successors, (94171), 73961 states have internal predecessors, (94171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73962 states to 73962 states and 94171 transitions. [2021-08-21 17:57:57,373 INFO L78 Accepts]: Start accepts. Automaton has 73962 states and 94171 transitions. Word has length 76 [2021-08-21 17:57:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:57,375 INFO L470 AbstractCegarLoop]: Abstraction has 73962 states and 94171 transitions. [2021-08-21 17:57:57,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 73962 states and 94171 transitions. [2021-08-21 17:57:57,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 17:57:57,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:57,455 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:57,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:57,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:57,669 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 562622954, now seen corresponding path program 78 times [2021-08-21 17:57:57,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:57,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560622558] [2021-08-21 17:57:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:57,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 107 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:57:57,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:57,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560622558] [2021-08-21 17:57:57,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560622558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:57,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442114264] [2021-08-21 17:57:57,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:57:57,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:57,735 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) [2021-08-21 17:57:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 17:57:59,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 17:57:59,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 17:57:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-08-21 17:58:00,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442114264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:00,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:00,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-08-21 17:58:00,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140673293] [2021-08-21 17:58:00,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:58:00,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:58:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:58:00,005 INFO L87 Difference]: Start difference. First operand 73962 states and 94171 transitions. Second operand has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:01,906 INFO L93 Difference]: Finished difference Result 145076 states and 180677 transitions. [2021-08-21 17:58:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-08-21 17:58:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 17:58:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:02,163 INFO L225 Difference]: With dead ends: 145076 [2021-08-21 17:58:02,163 INFO L226 Difference]: Without dead ends: 144956 [2021-08-21 17:58:02,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 1190.1ms TimeCoverageRelationStatistics Valid=1309, Invalid=11123, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 17:58:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144956 states. [2021-08-21 17:58:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144956 to 111942. [2021-08-21 17:58:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111942 states, 111941 states have (on average 1.2743766805728018) internal successors, (142655), 111941 states have internal predecessors, (142655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111942 states to 111942 states and 142655 transitions. [2021-08-21 17:58:04,594 INFO L78 Accepts]: Start accepts. Automaton has 111942 states and 142655 transitions. Word has length 76 [2021-08-21 17:58:04,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:04,594 INFO L470 AbstractCegarLoop]: Abstraction has 111942 states and 142655 transitions. [2021-08-21 17:58:04,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.894736842105263) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 111942 states and 142655 transitions. [2021-08-21 17:58:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:04,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:04,706 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:04,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:04,920 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,SelfDestructingSolverStorable86 [2021-08-21 17:58:04,921 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1394786240, now seen corresponding path program 79 times [2021-08-21 17:58:04,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:04,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029907925] [2021-08-21 17:58:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:04,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 169 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:05,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:05,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029907925] [2021-08-21 17:58:05,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029907925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:05,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106694349] [2021-08-21 17:58:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:05,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:05,004 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) [2021-08-21 17:58:05,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 17:58:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:06,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:58:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 169 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:07,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106694349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:07,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:07,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 17:58:07,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030988411] [2021-08-21 17:58:07,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:58:07,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:07,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:58:07,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:58:07,246 INFO L87 Difference]: Start difference. First operand 111942 states and 142655 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:07,745 INFO L93 Difference]: Finished difference Result 123184 states and 157931 transitions. [2021-08-21 17:58:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:58:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:07,972 INFO L225 Difference]: With dead ends: 123184 [2021-08-21 17:58:07,972 INFO L226 Difference]: Without dead ends: 123184 [2021-08-21 17:58:07,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:58:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123184 states. [2021-08-21 17:58:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123184 to 119390. [2021-08-21 17:58:09,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119390 states, 119389 states have (on average 1.273442276926685) internal successors, (152035), 119389 states have internal predecessors, (152035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119390 states to 119390 states and 152035 transitions. [2021-08-21 17:58:10,433 INFO L78 Accepts]: Start accepts. Automaton has 119390 states and 152035 transitions. Word has length 86 [2021-08-21 17:58:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:10,433 INFO L470 AbstractCegarLoop]: Abstraction has 119390 states and 152035 transitions. [2021-08-21 17:58:10,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 119390 states and 152035 transitions. [2021-08-21 17:58:10,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:10,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:10,558 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:10,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:10,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:10,779 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:10,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:10,779 INFO L82 PathProgramCache]: Analyzing trace with hash 58078690, now seen corresponding path program 80 times [2021-08-21 17:58:10,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:10,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108538184] [2021-08-21 17:58:10,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:10,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 162 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:10,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108538184] [2021-08-21 17:58:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108538184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:10,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882006921] [2021-08-21 17:58:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:10,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:10,872 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) [2021-08-21 17:58:10,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 17:58:12,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:12,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:12,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:58:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 162 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:12,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882006921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:12,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:12,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 17:58:12,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214027643] [2021-08-21 17:58:12,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:58:12,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:12,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:58:12,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:58:12,938 INFO L87 Difference]: Start difference. First operand 119390 states and 152035 transitions. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:13,453 INFO L93 Difference]: Finished difference Result 122858 states and 157280 transitions. [2021-08-21 17:58:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:58:13,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:13,663 INFO L225 Difference]: With dead ends: 122858 [2021-08-21 17:58:13,663 INFO L226 Difference]: Without dead ends: 122858 [2021-08-21 17:58:13,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=249, Invalid=401, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122858 states. [2021-08-21 17:58:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122858 to 119422. [2021-08-21 17:58:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119422 states, 119421 states have (on average 1.2735699751300023) internal successors, (152091), 119421 states have internal predecessors, (152091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119422 states to 119422 states and 152091 transitions. [2021-08-21 17:58:16,184 INFO L78 Accepts]: Start accepts. Automaton has 119422 states and 152091 transitions. Word has length 86 [2021-08-21 17:58:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:16,184 INFO L470 AbstractCegarLoop]: Abstraction has 119422 states and 152091 transitions. [2021-08-21 17:58:16,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 119422 states and 152091 transitions. [2021-08-21 17:58:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:16,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:16,310 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:16,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:16,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:16,511 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1803392576, now seen corresponding path program 81 times [2021-08-21 17:58:16,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:16,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046573388] [2021-08-21 17:58:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:16,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 155 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:16,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:16,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046573388] [2021-08-21 17:58:16,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046573388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:16,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901241142] [2021-08-21 17:58:16,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:16,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:16,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:16,614 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) [2021-08-21 17:58:16,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 17:58:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 17:58:18,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:58:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 155 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:18,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901241142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:18,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:18,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 17:58:18,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248753507] [2021-08-21 17:58:18,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:58:18,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:18,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:58:18,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:58:18,785 INFO L87 Difference]: Start difference. First operand 119422 states and 152091 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:19,316 INFO L93 Difference]: Finished difference Result 122124 states and 155813 transitions. [2021-08-21 17:58:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:58:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:19,540 INFO L225 Difference]: With dead ends: 122124 [2021-08-21 17:58:19,540 INFO L226 Difference]: Without dead ends: 122124 [2021-08-21 17:58:19,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=264, Invalid=438, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:58:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122124 states. [2021-08-21 17:58:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122124 to 119374. [2021-08-21 17:58:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119374 states, 119373 states have (on average 1.273210860077237) internal successors, (151987), 119373 states have internal predecessors, (151987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119374 states to 119374 states and 151987 transitions. [2021-08-21 17:58:21,982 INFO L78 Accepts]: Start accepts. Automaton has 119374 states and 151987 transitions. Word has length 86 [2021-08-21 17:58:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:21,982 INFO L470 AbstractCegarLoop]: Abstraction has 119374 states and 151987 transitions. [2021-08-21 17:58:21,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 119374 states and 151987 transitions. [2021-08-21 17:58:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:22,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:22,097 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:22,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:22,318 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,SelfDestructingSolverStorable89 [2021-08-21 17:58:22,318 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1528415006, now seen corresponding path program 82 times [2021-08-21 17:58:22,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:22,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033170238] [2021-08-21 17:58:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:22,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 148 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:22,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:22,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033170238] [2021-08-21 17:58:22,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033170238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:22,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191013413] [2021-08-21 17:58:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:22,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:22,427 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) [2021-08-21 17:58:22,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 17:58:24,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:24,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:58:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 148 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:24,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191013413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:24,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:24,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 17:58:24,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777643936] [2021-08-21 17:58:24,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:58:24,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:58:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:58:24,569 INFO L87 Difference]: Start difference. First operand 119374 states and 151987 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:25,068 INFO L93 Difference]: Finished difference Result 121144 states and 153852 transitions. [2021-08-21 17:58:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:58:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:25,295 INFO L225 Difference]: With dead ends: 121144 [2021-08-21 17:58:25,295 INFO L226 Difference]: Without dead ends: 121144 [2021-08-21 17:58:25,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121144 states. [2021-08-21 17:58:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121144 to 111358. [2021-08-21 17:58:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111358 states, 111357 states have (on average 1.2722954102571011) internal successors, (141679), 111357 states have internal predecessors, (141679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111358 states to 111358 states and 141679 transitions. [2021-08-21 17:58:27,404 INFO L78 Accepts]: Start accepts. Automaton has 111358 states and 141679 transitions. Word has length 86 [2021-08-21 17:58:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:27,405 INFO L470 AbstractCegarLoop]: Abstraction has 111358 states and 141679 transitions. [2021-08-21 17:58:27,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 15 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 111358 states and 141679 transitions. [2021-08-21 17:58:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:27,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:27,519 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:27,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 17:58:27,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:27,736 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash 81900352, now seen corresponding path program 83 times [2021-08-21 17:58:27,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:27,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179726740] [2021-08-21 17:58:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:27,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:28,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179726740] [2021-08-21 17:58:28,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179726740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:28,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128255598] [2021-08-21 17:58:28,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:58:28,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:28,221 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) [2021-08-21 17:58:28,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 17:58:30,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-21 17:58:30,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:30,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:58:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:30,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128255598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:30,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:30,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-08-21 17:58:30,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530320246] [2021-08-21 17:58:30,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:58:30,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:58:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:58:30,405 INFO L87 Difference]: Start difference. First operand 111358 states and 141679 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:30,978 INFO L93 Difference]: Finished difference Result 113782 states and 145175 transitions. [2021-08-21 17:58:30,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:58:30,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:31,182 INFO L225 Difference]: With dead ends: 113782 [2021-08-21 17:58:31,182 INFO L226 Difference]: Without dead ends: 113782 [2021-08-21 17:58:31,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:58:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113782 states. [2021-08-21 17:58:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113782 to 111910. [2021-08-21 17:58:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111910 states, 111909 states have (on average 1.2737402711131365) internal successors, (142543), 111909 states have internal predecessors, (142543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111910 states to 111910 states and 142543 transitions. [2021-08-21 17:58:33,143 INFO L78 Accepts]: Start accepts. Automaton has 111910 states and 142543 transitions. Word has length 86 [2021-08-21 17:58:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:33,143 INFO L470 AbstractCegarLoop]: Abstraction has 111910 states and 142543 transitions. [2021-08-21 17:58:33,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:33,143 INFO L276 IsEmpty]: Start isEmpty. Operand 111910 states and 142543 transitions. [2021-08-21 17:58:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:33,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:33,259 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:33,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:33,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:33,475 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:33,475 INFO L82 PathProgramCache]: Analyzing trace with hash -379143072, now seen corresponding path program 84 times [2021-08-21 17:58:33,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:33,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849590355] [2021-08-21 17:58:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:33,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 17:58:33,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:33,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849590355] [2021-08-21 17:58:33,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849590355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:33,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599091221] [2021-08-21 17:58:33,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:33,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:33,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:33,573 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) [2021-08-21 17:58:33,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 17:58:36,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:58:36,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:58:36,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-21 17:58:36,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599091221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:36,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:36,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-08-21 17:58:36,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138512485] [2021-08-21 17:58:36,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 17:58:36,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 17:58:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:58:36,243 INFO L87 Difference]: Start difference. First operand 111910 states and 142543 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:36,764 INFO L93 Difference]: Finished difference Result 114576 states and 145265 transitions. [2021-08-21 17:58:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:58:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:36,981 INFO L225 Difference]: With dead ends: 114576 [2021-08-21 17:58:36,981 INFO L226 Difference]: Without dead ends: 114340 [2021-08-21 17:58:36,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:58:37,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114340 states. [2021-08-21 17:58:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114340 to 106822. [2021-08-21 17:58:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106822 states, 106821 states have (on average 1.2734855505939844) internal successors, (136035), 106821 states have internal predecessors, (136035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106822 states to 106822 states and 136035 transitions. [2021-08-21 17:58:38,749 INFO L78 Accepts]: Start accepts. Automaton has 106822 states and 136035 transitions. Word has length 86 [2021-08-21 17:58:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:38,749 INFO L470 AbstractCegarLoop]: Abstraction has 106822 states and 136035 transitions. [2021-08-21 17:58:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 106822 states and 136035 transitions. [2021-08-21 17:58:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:39,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:39,300 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:39,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:39,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:39,517 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1281368834, now seen corresponding path program 85 times [2021-08-21 17:58:39,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:39,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568074740] [2021-08-21 17:58:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:39,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:39,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:39,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568074740] [2021-08-21 17:58:39,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568074740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:39,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404018589] [2021-08-21 17:58:39,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:39,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:39,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:39,601 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) [2021-08-21 17:58:39,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 17:58:41,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 17:58:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 167 proven. 60 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 17:58:41,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404018589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:41,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:41,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-08-21 17:58:41,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115091025] [2021-08-21 17:58:41,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:58:41,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:58:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:58:41,713 INFO L87 Difference]: Start difference. First operand 106822 states and 136035 transitions. Second operand has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:42,096 INFO L93 Difference]: Finished difference Result 115000 states and 146377 transitions. [2021-08-21 17:58:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:58:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:42,297 INFO L225 Difference]: With dead ends: 115000 [2021-08-21 17:58:42,297 INFO L226 Difference]: Without dead ends: 114988 [2021-08-21 17:58:42,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:58:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114988 states. [2021-08-21 17:58:44,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114988 to 114730. [2021-08-21 17:58:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114730 states, 114729 states have (on average 1.2734269452361653) internal successors, (146099), 114729 states have internal predecessors, (146099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:44,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114730 states to 114730 states and 146099 transitions. [2021-08-21 17:58:44,636 INFO L78 Accepts]: Start accepts. Automaton has 114730 states and 146099 transitions. Word has length 86 [2021-08-21 17:58:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:44,637 INFO L470 AbstractCegarLoop]: Abstraction has 114730 states and 146099 transitions. [2021-08-21 17:58:44,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.5) internal successors, (90), 11 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 114730 states and 146099 transitions. [2021-08-21 17:58:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 17:58:44,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:44,766 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:44,986 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,SelfDestructingSolverStorable93 [2021-08-21 17:58:44,986 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2139614952, now seen corresponding path program 86 times [2021-08-21 17:58:44,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:44,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756961065] [2021-08-21 17:58:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:44,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 152 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:45,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:45,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756961065] [2021-08-21 17:58:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756961065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:45,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863122839] [2021-08-21 17:58:45,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:45,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:45,109 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) [2021-08-21 17:58:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 17:58:47,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:47,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:58:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 109 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863122839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:47,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 17 [2021-08-21 17:58:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268316880] [2021-08-21 17:58:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:58:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:58:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:58:47,627 INFO L87 Difference]: Start difference. First operand 114730 states and 146099 transitions. Second operand has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:48,324 INFO L93 Difference]: Finished difference Result 122070 states and 155052 transitions. [2021-08-21 17:58:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:58:48,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 17:58:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:48,552 INFO L225 Difference]: With dead ends: 122070 [2021-08-21 17:58:48,552 INFO L226 Difference]: Without dead ends: 122070 [2021-08-21 17:58:48,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:58:48,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122070 states. [2021-08-21 17:58:50,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122070 to 118046. [2021-08-21 17:58:50,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118046 states, 118045 states have (on average 1.2716421703587615) internal successors, (150111), 118045 states have internal predecessors, (150111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118046 states to 118046 states and 150111 transitions. [2021-08-21 17:58:50,730 INFO L78 Accepts]: Start accepts. Automaton has 118046 states and 150111 transitions. Word has length 86 [2021-08-21 17:58:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:50,730 INFO L470 AbstractCegarLoop]: Abstraction has 118046 states and 150111 transitions. [2021-08-21 17:58:50,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.833333333333333) internal successors, (123), 17 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 118046 states and 150111 transitions. [2021-08-21 17:58:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:58:50,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:50,895 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:50,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:51,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:51,117 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:51,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:51,117 INFO L82 PathProgramCache]: Analyzing trace with hash -747401886, now seen corresponding path program 87 times [2021-08-21 17:58:51,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:51,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262796661] [2021-08-21 17:58:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:51,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:51,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:51,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262796661] [2021-08-21 17:58:51,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262796661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:51,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928822682] [2021-08-21 17:58:51,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:51,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:51,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:51,308 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) [2021-08-21 17:58:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 17:58:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 17:58:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:58:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:53,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928822682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:53,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:53,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-21 17:58:53,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962698777] [2021-08-21 17:58:53,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 17:58:53,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 17:58:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-08-21 17:58:53,662 INFO L87 Difference]: Start difference. First operand 118046 states and 150111 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:54,349 INFO L93 Difference]: Finished difference Result 151400 states and 189979 transitions. [2021-08-21 17:58:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:58:54,351 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:58:54,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:54,803 INFO L225 Difference]: With dead ends: 151400 [2021-08-21 17:58:54,804 INFO L226 Difference]: Without dead ends: 151240 [2021-08-21 17:58:54,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:58:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151240 states. [2021-08-21 17:58:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151240 to 141406. [2021-08-21 17:58:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141406 states, 141405 states have (on average 1.271433117640819) internal successors, (179787), 141405 states have internal predecessors, (179787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141406 states to 141406 states and 179787 transitions. [2021-08-21 17:58:57,310 INFO L78 Accepts]: Start accepts. Automaton has 141406 states and 179787 transitions. Word has length 96 [2021-08-21 17:58:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:57,310 INFO L470 AbstractCegarLoop]: Abstraction has 141406 states and 179787 transitions. [2021-08-21 17:58:57,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 141406 states and 179787 transitions. [2021-08-21 17:58:57,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:58:57,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:57,908 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:57,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 17:58:58,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:58,129 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:58:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:58,129 INFO L82 PathProgramCache]: Analyzing trace with hash 433954056, now seen corresponding path program 88 times [2021-08-21 17:58:58,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:58,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099491242] [2021-08-21 17:58:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:58,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:58,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:58,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099491242] [2021-08-21 17:58:58,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099491242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:58,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154157692] [2021-08-21 17:58:58,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:58,218 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:58,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:58,221 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) [2021-08-21 17:58:58,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 17:59:00,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:00,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154157692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:00,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:00,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:59:00,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328953226] [2021-08-21 17:59:00,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:00,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:00,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:00,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:00,618 INFO L87 Difference]: Start difference. First operand 141406 states and 179787 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:01,173 INFO L93 Difference]: Finished difference Result 151228 states and 190112 transitions. [2021-08-21 17:59:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:59:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:01,449 INFO L225 Difference]: With dead ends: 151228 [2021-08-21 17:59:01,449 INFO L226 Difference]: Without dead ends: 151228 [2021-08-21 17:59:01,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:59:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151228 states. [2021-08-21 17:59:03,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151228 to 137166. [2021-08-21 17:59:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137166 states, 137165 states have (on average 1.2710166587686362) internal successors, (174339), 137165 states have internal predecessors, (174339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137166 states to 137166 states and 174339 transitions. [2021-08-21 17:59:04,005 INFO L78 Accepts]: Start accepts. Automaton has 137166 states and 174339 transitions. Word has length 96 [2021-08-21 17:59:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:04,005 INFO L470 AbstractCegarLoop]: Abstraction has 137166 states and 174339 transitions. [2021-08-21 17:59:04,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 137166 states and 174339 transitions. [2021-08-21 17:59:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:04,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:04,205 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:04,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:04,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:04,420 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1200634788, now seen corresponding path program 89 times [2021-08-21 17:59:04,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:04,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820859599] [2021-08-21 17:59:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:04,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:04,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:04,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820859599] [2021-08-21 17:59:04,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820859599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:04,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288757999] [2021-08-21 17:59:04,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:04,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:04,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:04,504 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) [2021-08-21 17:59:04,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 17:59:06,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 17:59:06,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:06,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:06,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:07,086 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:07,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288757999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:07,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:07,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:59:07,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53756254] [2021-08-21 17:59:07,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:07,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:07,087 INFO L87 Difference]: Start difference. First operand 137166 states and 174339 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:07,635 INFO L93 Difference]: Finished difference Result 152946 states and 192260 transitions. [2021-08-21 17:59:07,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:59:07,635 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:07,922 INFO L225 Difference]: With dead ends: 152946 [2021-08-21 17:59:07,922 INFO L226 Difference]: Without dead ends: 152942 [2021-08-21 17:59:07,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:59:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152942 states. [2021-08-21 17:59:10,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152942 to 144946. [2021-08-21 17:59:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144946 states, 144945 states have (on average 1.2702680327020595) internal successors, (184119), 144945 states have internal predecessors, (184119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144946 states to 144946 states and 184119 transitions. [2021-08-21 17:59:10,856 INFO L78 Accepts]: Start accepts. Automaton has 144946 states and 184119 transitions. Word has length 96 [2021-08-21 17:59:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:10,856 INFO L470 AbstractCegarLoop]: Abstraction has 144946 states and 184119 transitions. [2021-08-21 17:59:10,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 144946 states and 184119 transitions. [2021-08-21 17:59:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:11,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:11,054 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:11,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-21 17:59:11,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:11,269 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1436693942, now seen corresponding path program 90 times [2021-08-21 17:59:11,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:11,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538591011] [2021-08-21 17:59:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:11,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:11,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:11,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538591011] [2021-08-21 17:59:11,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538591011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:11,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978624839] [2021-08-21 17:59:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:11,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:11,398 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) [2021-08-21 17:59:11,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 17:59:13,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 17:59:13,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:13,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:13,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:13,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978624839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:13,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:13,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:59:13,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517680198] [2021-08-21 17:59:13,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:13,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:13,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:13,914 INFO L87 Difference]: Start difference. First operand 144946 states and 184119 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:14,539 INFO L93 Difference]: Finished difference Result 152938 states and 192246 transitions. [2021-08-21 17:59:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:59:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:14,835 INFO L225 Difference]: With dead ends: 152938 [2021-08-21 17:59:14,835 INFO L226 Difference]: Without dead ends: 152938 [2021-08-21 17:59:14,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:59:15,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152938 states. [2021-08-21 17:59:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152938 to 144926. [2021-08-21 17:59:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144926 states, 144925 states have (on average 1.2702501293772641) internal successors, (184091), 144925 states have internal predecessors, (184091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144926 states to 144926 states and 184091 transitions. [2021-08-21 17:59:17,825 INFO L78 Accepts]: Start accepts. Automaton has 144926 states and 184091 transitions. Word has length 96 [2021-08-21 17:59:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:17,825 INFO L470 AbstractCegarLoop]: Abstraction has 144926 states and 184091 transitions. [2021-08-21 17:59:17,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 144926 states and 184091 transitions. [2021-08-21 17:59:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:18,030 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:18,030 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:18,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-21 17:59:18,244 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,SelfDestructingSolverStorable98 [2021-08-21 17:59:18,245 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1046490016, now seen corresponding path program 91 times [2021-08-21 17:59:18,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:18,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351768445] [2021-08-21 17:59:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:18,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:18,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:18,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351768445] [2021-08-21 17:59:18,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351768445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:18,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606000287] [2021-08-21 17:59:18,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:59:18,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:18,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:18,333 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) [2021-08-21 17:59:18,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 17:59:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:20,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:20,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:20,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606000287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:20,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:20,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 17:59:20,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128672556] [2021-08-21 17:59:20,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:59:20,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:59:20,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:59:20,963 INFO L87 Difference]: Start difference. First operand 144926 states and 184091 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:21,627 INFO L93 Difference]: Finished difference Result 154978 states and 196342 transitions. [2021-08-21 17:59:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:59:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:21,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:21,947 INFO L225 Difference]: With dead ends: 154978 [2021-08-21 17:59:21,947 INFO L226 Difference]: Without dead ends: 154978 [2021-08-21 17:59:21,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:59:22,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154978 states. [2021-08-21 17:59:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154978 to 138646. [2021-08-21 17:59:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138646 states, 138645 states have (on average 1.2698258141296117) internal successors, (176055), 138645 states have internal predecessors, (176055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138646 states to 138646 states and 176055 transitions. [2021-08-21 17:59:24,970 INFO L78 Accepts]: Start accepts. Automaton has 138646 states and 176055 transitions. Word has length 96 [2021-08-21 17:59:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:24,970 INFO L470 AbstractCegarLoop]: Abstraction has 138646 states and 176055 transitions. [2021-08-21 17:59:24,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:24,970 INFO L276 IsEmpty]: Start isEmpty. Operand 138646 states and 176055 transitions. [2021-08-21 17:59:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:25,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:25,165 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:25,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:25,386 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,SelfDestructingSolverStorable99 [2021-08-21 17:59:25,386 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:25,387 INFO L82 PathProgramCache]: Analyzing trace with hash -668163328, now seen corresponding path program 92 times [2021-08-21 17:59:25,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:25,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392268422] [2021-08-21 17:59:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:25,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:59:25,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:25,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392268422] [2021-08-21 17:59:25,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392268422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:25,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361520438] [2021-08-21 17:59:25,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:25,469 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:25,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:25,470 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) [2021-08-21 17:59:25,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 17:59:27,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:27,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 17:59:28,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361520438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:28,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:28,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:59:28,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402180820] [2021-08-21 17:59:28,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:28,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:28,072 INFO L87 Difference]: Start difference. First operand 138646 states and 176055 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:28,770 INFO L93 Difference]: Finished difference Result 159808 states and 200901 transitions. [2021-08-21 17:59:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:59:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:29,058 INFO L225 Difference]: With dead ends: 159808 [2021-08-21 17:59:29,059 INFO L226 Difference]: Without dead ends: 159784 [2021-08-21 17:59:29,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:59:29,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159784 states. [2021-08-21 17:59:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159784 to 146130. [2021-08-21 17:59:32,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146130 states, 146129 states have (on average 1.2699395739380959) internal successors, (185575), 146129 states have internal predecessors, (185575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146130 states to 146130 states and 185575 transitions. [2021-08-21 17:59:32,680 INFO L78 Accepts]: Start accepts. Automaton has 146130 states and 185575 transitions. Word has length 96 [2021-08-21 17:59:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:32,680 INFO L470 AbstractCegarLoop]: Abstraction has 146130 states and 185575 transitions. [2021-08-21 17:59:32,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 146130 states and 185575 transitions. [2021-08-21 17:59:32,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:32,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:32,884 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:32,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:33,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 17:59:33,105 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1944699038, now seen corresponding path program 93 times [2021-08-21 17:59:33,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:33,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607485674] [2021-08-21 17:59:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:33,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:33,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:33,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607485674] [2021-08-21 17:59:33,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607485674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:33,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190499004] [2021-08-21 17:59:33,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:33,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:33,185 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) [2021-08-21 17:59:33,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 17:59:35,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 17:59:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:35,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:35,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190499004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:35,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:35,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:59:35,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678727195] [2021-08-21 17:59:35,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:35,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:35,868 INFO L87 Difference]: Start difference. First operand 146130 states and 185575 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:36,507 INFO L93 Difference]: Finished difference Result 158774 states and 199970 transitions. [2021-08-21 17:59:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:59:36,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:36,821 INFO L225 Difference]: With dead ends: 158774 [2021-08-21 17:59:36,821 INFO L226 Difference]: Without dead ends: 158770 [2021-08-21 17:59:36,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:59:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158770 states. [2021-08-21 17:59:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158770 to 148470. [2021-08-21 17:59:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148470 states, 148469 states have (on average 1.2692952737608525) internal successors, (188451), 148469 states have internal predecessors, (188451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148470 states to 148470 states and 188451 transitions. [2021-08-21 17:59:40,082 INFO L78 Accepts]: Start accepts. Automaton has 148470 states and 188451 transitions. Word has length 96 [2021-08-21 17:59:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:40,082 INFO L470 AbstractCegarLoop]: Abstraction has 148470 states and 188451 transitions. [2021-08-21 17:59:40,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 148470 states and 188451 transitions. [2021-08-21 17:59:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:40,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:40,285 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:40,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:40,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:40,501 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash -287060472, now seen corresponding path program 94 times [2021-08-21 17:59:40,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:40,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961678113] [2021-08-21 17:59:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:40,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:40,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:40,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961678113] [2021-08-21 17:59:40,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961678113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:40,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623427726] [2021-08-21 17:59:40,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:40,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:40,594 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) [2021-08-21 17:59:40,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 17:59:43,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:43,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:43,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:43,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623427726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:43,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:43,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 17:59:43,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588485474] [2021-08-21 17:59:43,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 17:59:43,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 17:59:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:59:43,259 INFO L87 Difference]: Start difference. First operand 148470 states and 188451 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:43,776 INFO L93 Difference]: Finished difference Result 154862 states and 195339 transitions. [2021-08-21 17:59:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:59:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:44,048 INFO L225 Difference]: With dead ends: 154862 [2021-08-21 17:59:44,048 INFO L226 Difference]: Without dead ends: 154862 [2021-08-21 17:59:44,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:59:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154862 states. [2021-08-21 17:59:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154862 to 148470. [2021-08-21 17:59:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148470 states, 148469 states have (on average 1.2692952737608525) internal successors, (188451), 148469 states have internal predecessors, (188451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148470 states to 148470 states and 188451 transitions. [2021-08-21 17:59:46,812 INFO L78 Accepts]: Start accepts. Automaton has 148470 states and 188451 transitions. Word has length 96 [2021-08-21 17:59:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:46,813 INFO L470 AbstractCegarLoop]: Abstraction has 148470 states and 188451 transitions. [2021-08-21 17:59:46,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 148470 states and 188451 transitions. [2021-08-21 17:59:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:47,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:47,027 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:47,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:47,232 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,SelfDestructingSolverStorable102 [2021-08-21 17:59:47,233 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:47,233 INFO L82 PathProgramCache]: Analyzing trace with hash 103143454, now seen corresponding path program 95 times [2021-08-21 17:59:47,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:47,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346800140] [2021-08-21 17:59:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:47,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:47,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:47,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346800140] [2021-08-21 17:59:47,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346800140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:47,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346120485] [2021-08-21 17:59:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:47,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:47,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:47,760 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) [2021-08-21 17:59:47,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 17:59:49,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 17:59:49,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:59:50,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346120485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:50,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:50,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 17:59:50,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377691817] [2021-08-21 17:59:50,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:59:50,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:50,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:59:50,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:59:50,199 INFO L87 Difference]: Start difference. First operand 148470 states and 188451 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:50,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:50,789 INFO L93 Difference]: Finished difference Result 154478 states and 194576 transitions. [2021-08-21 17:59:50,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:59:50,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:50,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:51,055 INFO L225 Difference]: With dead ends: 154478 [2021-08-21 17:59:51,055 INFO L226 Difference]: Without dead ends: 154478 [2021-08-21 17:59:51,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:59:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154478 states. [2021-08-21 17:59:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154478 to 148366. [2021-08-21 17:59:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148366 states, 148365 states have (on average 1.2692953189768477) internal successors, (188319), 148365 states have internal predecessors, (188319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148366 states to 148366 states and 188319 transitions. [2021-08-21 17:59:54,117 INFO L78 Accepts]: Start accepts. Automaton has 148366 states and 188319 transitions. Word has length 96 [2021-08-21 17:59:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:54,117 INFO L470 AbstractCegarLoop]: Abstraction has 148366 states and 188319 transitions. [2021-08-21 17:59:54,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 148366 states and 188319 transitions. [2021-08-21 17:59:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 17:59:54,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:54,694 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:54,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 17:59:54,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 17:59:54,929 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:59:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1556008384, now seen corresponding path program 96 times [2021-08-21 17:59:54,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:54,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319977016] [2021-08-21 17:59:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:54,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:55,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:55,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319977016] [2021-08-21 17:59:55,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319977016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:55,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190767081] [2021-08-21 17:59:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:55,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:55,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:55,025 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) [2021-08-21 17:59:55,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 17:59:57,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 17:59:57,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 17:59:57,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:57,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190767081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:57,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:57,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 17:59:57,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426302558] [2021-08-21 17:59:57,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:59:57,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:59:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:59:57,706 INFO L87 Difference]: Start difference. First operand 148366 states and 188319 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:58,272 INFO L93 Difference]: Finished difference Result 157146 states and 199992 transitions. [2021-08-21 17:59:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:59:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 17:59:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:58,756 INFO L225 Difference]: With dead ends: 157146 [2021-08-21 17:59:58,756 INFO L226 Difference]: Without dead ends: 157146 [2021-08-21 17:59:58,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:59:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157146 states. [2021-08-21 18:00:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157146 to 145166. [2021-08-21 18:00:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145166 states, 145165 states have (on average 1.2693348947749112) internal successors, (184263), 145165 states have internal predecessors, (184263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145166 states to 145166 states and 184263 transitions. [2021-08-21 18:00:01,570 INFO L78 Accepts]: Start accepts. Automaton has 145166 states and 184263 transitions. Word has length 96 [2021-08-21 18:00:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:01,571 INFO L470 AbstractCegarLoop]: Abstraction has 145166 states and 184263 transitions. [2021-08-21 18:00:01,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 145166 states and 184263 transitions. [2021-08-21 18:00:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:01,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:01,840 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:01,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:02,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:02,063 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -21542940, now seen corresponding path program 97 times [2021-08-21 18:00:02,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:02,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948010662] [2021-08-21 18:00:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:02,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:00:02,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:02,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948010662] [2021-08-21 18:00:02,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948010662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:02,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731250392] [2021-08-21 18:00:02,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:02,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:02,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:02,169 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) [2021-08-21 18:00:02,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:00:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:04,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:04,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:00:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731250392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:05,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:05,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:00:05,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989658850] [2021-08-21 18:00:05,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:00:05,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:00:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:00:05,089 INFO L87 Difference]: Start difference. First operand 145166 states and 184263 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:05,844 INFO L93 Difference]: Finished difference Result 162832 states and 204822 transitions. [2021-08-21 18:00:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:00:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:06,206 INFO L225 Difference]: With dead ends: 162832 [2021-08-21 18:00:06,206 INFO L226 Difference]: Without dead ends: 162788 [2021-08-21 18:00:06,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:00:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162788 states. [2021-08-21 18:00:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162788 to 153410. [2021-08-21 18:00:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153410 states, 153409 states have (on average 1.269280159573428) internal successors, (194719), 153409 states have internal predecessors, (194719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153410 states to 153410 states and 194719 transitions. [2021-08-21 18:00:09,394 INFO L78 Accepts]: Start accepts. Automaton has 153410 states and 194719 transitions. Word has length 96 [2021-08-21 18:00:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:09,394 INFO L470 AbstractCegarLoop]: Abstraction has 153410 states and 194719 transitions. [2021-08-21 18:00:09,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 153410 states and 194719 transitions. [2021-08-21 18:00:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:09,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:09,606 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:09,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:09,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:09,829 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 75198240, now seen corresponding path program 98 times [2021-08-21 18:00:09,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:09,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787675270] [2021-08-21 18:00:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:09,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:00:09,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:09,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787675270] [2021-08-21 18:00:09,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787675270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:09,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750435522] [2021-08-21 18:00:09,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:09,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:09,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:09,933 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) [2021-08-21 18:00:09,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:00:12,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:12,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:00:13,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750435522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:13,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:13,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:00:13,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946885982] [2021-08-21 18:00:13,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:00:13,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:00:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:00:13,033 INFO L87 Difference]: Start difference. First operand 153410 states and 194719 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:13,704 INFO L93 Difference]: Finished difference Result 169392 states and 213431 transitions. [2021-08-21 18:00:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:14,067 INFO L225 Difference]: With dead ends: 169392 [2021-08-21 18:00:14,068 INFO L226 Difference]: Without dead ends: 169368 [2021-08-21 18:00:14,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:00:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169368 states. [2021-08-21 18:00:16,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169368 to 154250. [2021-08-21 18:00:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154250 states, 154249 states have (on average 1.2691881308792925) internal successors, (195771), 154249 states have internal predecessors, (195771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154250 states to 154250 states and 195771 transitions. [2021-08-21 18:00:17,437 INFO L78 Accepts]: Start accepts. Automaton has 154250 states and 195771 transitions. Word has length 96 [2021-08-21 18:00:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:17,438 INFO L470 AbstractCegarLoop]: Abstraction has 154250 states and 195771 transitions. [2021-08-21 18:00:17,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 154250 states and 195771 transitions. [2021-08-21 18:00:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:18,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:18,008 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:18,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:18,213 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,SelfDestructingSolverStorable106 [2021-08-21 18:00:18,213 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash 392810020, now seen corresponding path program 99 times [2021-08-21 18:00:18,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:18,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861980916] [2021-08-21 18:00:18,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:18,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:18,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:18,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861980916] [2021-08-21 18:00:18,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861980916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:18,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620490818] [2021-08-21 18:00:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:18,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:18,313 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) [2021-08-21 18:00:18,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:00:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 18:00:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:20,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:20,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620490818] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:21,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:21,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:00:21,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414494614] [2021-08-21 18:00:21,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:00:21,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:00:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:00:21,182 INFO L87 Difference]: Start difference. First operand 154250 states and 195771 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:21,848 INFO L93 Difference]: Finished difference Result 166462 states and 209960 transitions. [2021-08-21 18:00:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:22,174 INFO L225 Difference]: With dead ends: 166462 [2021-08-21 18:00:22,175 INFO L226 Difference]: Without dead ends: 166454 [2021-08-21 18:00:22,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:00:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166454 states. [2021-08-21 18:00:24,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166454 to 157670. [2021-08-21 18:00:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157670 states, 157669 states have (on average 1.2685753064965213) internal successors, (200015), 157669 states have internal predecessors, (200015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157670 states to 157670 states and 200015 transitions. [2021-08-21 18:00:25,117 INFO L78 Accepts]: Start accepts. Automaton has 157670 states and 200015 transitions. Word has length 96 [2021-08-21 18:00:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:25,117 INFO L470 AbstractCegarLoop]: Abstraction has 157670 states and 200015 transitions. [2021-08-21 18:00:25,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 157670 states and 200015 transitions. [2021-08-21 18:00:25,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:25,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:25,344 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:25,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:25,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:25,569 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2050448586, now seen corresponding path program 100 times [2021-08-21 18:00:25,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:25,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746861243] [2021-08-21 18:00:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:25,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:26,193 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:26,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:26,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746861243] [2021-08-21 18:00:26,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746861243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:26,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152372046] [2021-08-21 18:00:26,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:26,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:26,195 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) [2021-08-21 18:00:26,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:00:28,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:28,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152372046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:28,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:28,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:00:28,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370366598] [2021-08-21 18:00:28,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:00:28,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:28,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:00:28,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:00:28,764 INFO L87 Difference]: Start difference. First operand 157670 states and 200015 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:29,358 INFO L93 Difference]: Finished difference Result 163070 states and 206227 transitions. [2021-08-21 18:00:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:29,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:29,679 INFO L225 Difference]: With dead ends: 163070 [2021-08-21 18:00:29,680 INFO L226 Difference]: Without dead ends: 163070 [2021-08-21 18:00:29,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:00:29,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163070 states. [2021-08-21 18:00:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163070 to 157670. [2021-08-21 18:00:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157670 states, 157669 states have (on average 1.2685753064965213) internal successors, (200015), 157669 states have internal predecessors, (200015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157670 states to 157670 states and 200015 transitions. [2021-08-21 18:00:32,934 INFO L78 Accepts]: Start accepts. Automaton has 157670 states and 200015 transitions. Word has length 96 [2021-08-21 18:00:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:32,934 INFO L470 AbstractCegarLoop]: Abstraction has 157670 states and 200015 transitions. [2021-08-21 18:00:32,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 157670 states and 200015 transitions. [2021-08-21 18:00:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:33,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:33,219 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:33,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:33,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:33,426 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1854314784, now seen corresponding path program 101 times [2021-08-21 18:00:33,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:33,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140598893] [2021-08-21 18:00:33,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:33,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:33,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:33,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140598893] [2021-08-21 18:00:33,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140598893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:33,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886061150] [2021-08-21 18:00:33,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:33,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:33,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:33,510 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) [2021-08-21 18:00:33,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:00:36,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 18:00:36,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:36,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886061150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:36,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:36,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 18:00:36,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387348936] [2021-08-21 18:00:36,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:00:36,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:00:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:00:36,642 INFO L87 Difference]: Start difference. First operand 157670 states and 200015 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:37,362 INFO L93 Difference]: Finished difference Result 164102 states and 208291 transitions. [2021-08-21 18:00:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:37,731 INFO L225 Difference]: With dead ends: 164102 [2021-08-21 18:00:37,731 INFO L226 Difference]: Without dead ends: 164102 [2021-08-21 18:00:37,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:37,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164102 states. [2021-08-21 18:00:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164102 to 157670. [2021-08-21 18:00:40,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157670 states, 157669 states have (on average 1.2685753064965213) internal successors, (200015), 157669 states have internal predecessors, (200015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157670 states to 157670 states and 200015 transitions. [2021-08-21 18:00:41,041 INFO L78 Accepts]: Start accepts. Automaton has 157670 states and 200015 transitions. Word has length 96 [2021-08-21 18:00:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:41,041 INFO L470 AbstractCegarLoop]: Abstraction has 157670 states and 200015 transitions. [2021-08-21 18:00:41,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 157670 states and 200015 transitions. [2021-08-21 18:00:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:41,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:41,254 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:41,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:41,467 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,SelfDestructingSolverStorable109 [2021-08-21 18:00:41,467 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:41,468 INFO L82 PathProgramCache]: Analyzing trace with hash -401449854, now seen corresponding path program 102 times [2021-08-21 18:00:41,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:41,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112583613] [2021-08-21 18:00:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:41,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:41,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:41,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112583613] [2021-08-21 18:00:41,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112583613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:41,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547495243] [2021-08-21 18:00:41,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:41,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:41,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:41,984 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) [2021-08-21 18:00:41,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:00:44,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:00:44,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:00:44,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547495243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:44,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:44,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:00:44,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107745912] [2021-08-21 18:00:44,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:00:44,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:00:44,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:00:44,906 INFO L87 Difference]: Start difference. First operand 157670 states and 200015 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:45,686 INFO L93 Difference]: Finished difference Result 162382 states and 204852 transitions. [2021-08-21 18:00:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:00:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:46,028 INFO L225 Difference]: With dead ends: 162382 [2021-08-21 18:00:46,028 INFO L226 Difference]: Without dead ends: 162382 [2021-08-21 18:00:46,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 120.1ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162382 states. [2021-08-21 18:00:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162382 to 157422. [2021-08-21 18:00:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157422 states, 157421 states have (on average 1.2683885885618817) internal successors, (199671), 157421 states have internal predecessors, (199671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157422 states to 157422 states and 199671 transitions. [2021-08-21 18:00:49,310 INFO L78 Accepts]: Start accepts. Automaton has 157422 states and 199671 transitions. Word has length 96 [2021-08-21 18:00:49,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:49,310 INFO L470 AbstractCegarLoop]: Abstraction has 157422 states and 199671 transitions. [2021-08-21 18:00:49,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:49,310 INFO L276 IsEmpty]: Start isEmpty. Operand 157422 states and 199671 transitions. [2021-08-21 18:00:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:49,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:49,524 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:49,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:49,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:49,753 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:49,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:49,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2032046176, now seen corresponding path program 103 times [2021-08-21 18:00:49,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:49,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119426779] [2021-08-21 18:00:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:49,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:49,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:49,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119426779] [2021-08-21 18:00:49,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119426779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:49,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170059077] [2021-08-21 18:00:49,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:49,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:49,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:49,886 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) [2021-08-21 18:00:49,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:00:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:53,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:00:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:53,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170059077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:53,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:53,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 18:00:53,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908178831] [2021-08-21 18:00:53,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:00:53,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:00:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:00:53,329 INFO L87 Difference]: Start difference. First operand 157422 states and 199671 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:53,959 INFO L93 Difference]: Finished difference Result 165078 states and 210404 transitions. [2021-08-21 18:00:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:00:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:00:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:54,286 INFO L225 Difference]: With dead ends: 165078 [2021-08-21 18:00:54,286 INFO L226 Difference]: Without dead ends: 165078 [2021-08-21 18:00:54,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:00:54,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165078 states. [2021-08-21 18:00:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165078 to 157710. [2021-08-21 18:00:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157710 states, 157709 states have (on average 1.2687100926389743) internal successors, (200087), 157709 states have internal predecessors, (200087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:57,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157710 states to 157710 states and 200087 transitions. [2021-08-21 18:00:57,887 INFO L78 Accepts]: Start accepts. Automaton has 157710 states and 200087 transitions. Word has length 96 [2021-08-21 18:00:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:57,888 INFO L470 AbstractCegarLoop]: Abstraction has 157710 states and 200087 transitions. [2021-08-21 18:00:57,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 157710 states and 200087 transitions. [2021-08-21 18:00:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:00:58,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:58,092 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:58,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:58,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:00:58,313 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:00:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1796437794, now seen corresponding path program 104 times [2021-08-21 18:00:58,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:58,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050809836] [2021-08-21 18:00:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:58,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:00:58,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:58,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050809836] [2021-08-21 18:00:58,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050809836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:58,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836460780] [2021-08-21 18:00:58,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:58,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:58,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:58,400 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) [2021-08-21 18:00:58,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:01:01,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:01,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:01,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:01:01,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836460780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:01,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:01,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:01:01,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967322462] [2021-08-21 18:01:01,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:01:01,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:01:01,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:01:01,535 INFO L87 Difference]: Start difference. First operand 157710 states and 200087 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:02,113 INFO L93 Difference]: Finished difference Result 169884 states and 214116 transitions. [2021-08-21 18:01:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:01:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:02,689 INFO L225 Difference]: With dead ends: 169884 [2021-08-21 18:01:02,689 INFO L226 Difference]: Without dead ends: 169840 [2021-08-21 18:01:02,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169840 states. [2021-08-21 18:01:04,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169840 to 162214. [2021-08-21 18:01:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162214 states, 162213 states have (on average 1.2685974613625295) internal successors, (205783), 162213 states have internal predecessors, (205783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162214 states to 162214 states and 205783 transitions. [2021-08-21 18:01:05,900 INFO L78 Accepts]: Start accepts. Automaton has 162214 states and 205783 transitions. Word has length 96 [2021-08-21 18:01:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:05,900 INFO L470 AbstractCegarLoop]: Abstraction has 162214 states and 205783 transitions. [2021-08-21 18:01:05,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 162214 states and 205783 transitions. [2021-08-21 18:01:06,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:06,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:06,112 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:06,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:06,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:06,335 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash -416321792, now seen corresponding path program 105 times [2021-08-21 18:01:06,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:06,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907427048] [2021-08-21 18:01:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:06,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:01:06,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:06,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907427048] [2021-08-21 18:01:06,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907427048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:06,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722640856] [2021-08-21 18:01:06,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:06,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:06,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:06,414 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) [2021-08-21 18:01:06,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:01:09,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 18:01:09,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:01:09,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722640856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:09,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:09,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:01:09,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139964989] [2021-08-21 18:01:09,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:01:09,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:09,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:01:09,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:01:09,661 INFO L87 Difference]: Start difference. First operand 162214 states and 205783 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:10,297 INFO L93 Difference]: Finished difference Result 176840 states and 223069 transitions. [2021-08-21 18:01:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:01:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:10,626 INFO L225 Difference]: With dead ends: 176840 [2021-08-21 18:01:10,626 INFO L226 Difference]: Without dead ends: 176792 [2021-08-21 18:01:10,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:11,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176792 states. [2021-08-21 18:01:13,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176792 to 163414. [2021-08-21 18:01:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163414 states, 163413 states have (on average 1.268705672131348) internal successors, (207323), 163413 states have internal predecessors, (207323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:13,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163414 states to 163414 states and 207323 transitions. [2021-08-21 18:01:13,927 INFO L78 Accepts]: Start accepts. Automaton has 163414 states and 207323 transitions. Word has length 96 [2021-08-21 18:01:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:13,928 INFO L470 AbstractCegarLoop]: Abstraction has 163414 states and 207323 transitions. [2021-08-21 18:01:13,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 163414 states and 207323 transitions. [2021-08-21 18:01:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:14,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:14,155 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:14,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:14,370 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,SelfDestructingSolverStorable113 [2021-08-21 18:01:14,371 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:14,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:14,371 INFO L82 PathProgramCache]: Analyzing trace with hash 474266722, now seen corresponding path program 106 times [2021-08-21 18:01:14,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:14,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581413680] [2021-08-21 18:01:14,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:14,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:14,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:14,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581413680] [2021-08-21 18:01:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581413680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:14,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367077317] [2021-08-21 18:01:14,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:14,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:14,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:14,486 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) [2021-08-21 18:01:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:01:17,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:17,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:17,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:17,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367077317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:17,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:17,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:01:17,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450584634] [2021-08-21 18:01:17,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:01:17,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:01:17,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:01:17,543 INFO L87 Difference]: Start difference. First operand 163414 states and 207323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:18,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:18,192 INFO L93 Difference]: Finished difference Result 175350 states and 221332 transitions. [2021-08-21 18:01:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:01:18,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:18,540 INFO L225 Difference]: With dead ends: 175350 [2021-08-21 18:01:18,540 INFO L226 Difference]: Without dead ends: 175342 [2021-08-21 18:01:18,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175342 states. [2021-08-21 18:01:21,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175342 to 167754. [2021-08-21 18:01:21,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167754 states, 167753 states have (on average 1.267762722574261) internal successors, (212671), 167753 states have internal predecessors, (212671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167754 states to 167754 states and 212671 transitions. [2021-08-21 18:01:22,057 INFO L78 Accepts]: Start accepts. Automaton has 167754 states and 212671 transitions. Word has length 96 [2021-08-21 18:01:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:22,057 INFO L470 AbstractCegarLoop]: Abstraction has 167754 states and 212671 transitions. [2021-08-21 18:01:22,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 167754 states and 212671 transitions. [2021-08-21 18:01:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:22,288 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:22,288 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:22,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:22,511 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,SelfDestructingSolverStorable114 [2021-08-21 18:01:22,512 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2131905288, now seen corresponding path program 107 times [2021-08-21 18:01:22,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:22,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134766828] [2021-08-21 18:01:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:22,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:22,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:22,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134766828] [2021-08-21 18:01:22,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134766828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:22,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58791480] [2021-08-21 18:01:22,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:22,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:22,589 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) [2021-08-21 18:01:22,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:01:25,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 18:01:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:25,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58791480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:25,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:25,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:01:25,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104468021] [2021-08-21 18:01:25,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:01:25,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:01:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:01:25,862 INFO L87 Difference]: Start difference. First operand 167754 states and 212671 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:26,469 INFO L93 Difference]: Finished difference Result 172526 states and 218499 transitions. [2021-08-21 18:01:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:01:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:26,788 INFO L225 Difference]: With dead ends: 172526 [2021-08-21 18:01:26,789 INFO L226 Difference]: Without dead ends: 172526 [2021-08-21 18:01:26,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:01:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172526 states. [2021-08-21 18:01:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172526 to 167754. [2021-08-21 18:01:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167754 states, 167753 states have (on average 1.267762722574261) internal successors, (212671), 167753 states have internal predecessors, (212671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167754 states to 167754 states and 212671 transitions. [2021-08-21 18:01:30,119 INFO L78 Accepts]: Start accepts. Automaton has 167754 states and 212671 transitions. Word has length 96 [2021-08-21 18:01:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:30,119 INFO L470 AbstractCegarLoop]: Abstraction has 167754 states and 212671 transitions. [2021-08-21 18:01:30,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:30,119 INFO L276 IsEmpty]: Start isEmpty. Operand 167754 states and 212671 transitions. [2021-08-21 18:01:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:30,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:30,368 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:30,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:30,569 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,SelfDestructingSolverStorable115 [2021-08-21 18:01:30,569 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1772858082, now seen corresponding path program 108 times [2021-08-21 18:01:30,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:30,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577701321] [2021-08-21 18:01:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:30,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:30,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:30,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577701321] [2021-08-21 18:01:30,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577701321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:30,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89095524] [2021-08-21 18:01:30,673 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:30,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:30,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:30,674 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) [2021-08-21 18:01:30,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 18:01:33,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 18:01:33,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:33,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89095524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:34,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:34,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 18:01:34,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440946290] [2021-08-21 18:01:34,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:01:34,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:01:34,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:01:34,031 INFO L87 Difference]: Start difference. First operand 167754 states and 212671 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:34,667 INFO L93 Difference]: Finished difference Result 174782 states and 223011 transitions. [2021-08-21 18:01:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:01:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:35,309 INFO L225 Difference]: With dead ends: 174782 [2021-08-21 18:01:35,309 INFO L226 Difference]: Without dead ends: 174782 [2021-08-21 18:01:35,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=229, Invalid=371, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:01:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174782 states. [2021-08-21 18:01:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174782 to 167754. [2021-08-21 18:01:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167754 states, 167753 states have (on average 1.267762722574261) internal successors, (212671), 167753 states have internal predecessors, (212671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167754 states to 167754 states and 212671 transitions. [2021-08-21 18:01:38,606 INFO L78 Accepts]: Start accepts. Automaton has 167754 states and 212671 transitions. Word has length 96 [2021-08-21 18:01:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:38,607 INFO L470 AbstractCegarLoop]: Abstraction has 167754 states and 212671 transitions. [2021-08-21 18:01:38,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 167754 states and 212671 transitions. [2021-08-21 18:01:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:38,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:38,848 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:38,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:39,063 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,SelfDestructingSolverStorable116 [2021-08-21 18:01:39,063 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:39,063 INFO L82 PathProgramCache]: Analyzing trace with hash -319993152, now seen corresponding path program 109 times [2021-08-21 18:01:39,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:39,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984866590] [2021-08-21 18:01:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:39,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:39,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:39,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984866590] [2021-08-21 18:01:39,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984866590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:39,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868050438] [2021-08-21 18:01:39,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:39,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:39,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:39,181 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) [2021-08-21 18:01:39,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 18:01:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:42,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:42,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868050438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:42,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:42,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:01:42,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765440476] [2021-08-21 18:01:42,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:01:42,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:01:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:01:42,586 INFO L87 Difference]: Start difference. First operand 167754 states and 212671 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:43,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:43,264 INFO L93 Difference]: Finished difference Result 174114 states and 221675 transitions. [2021-08-21 18:01:43,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:01:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:43,831 INFO L225 Difference]: With dead ends: 174114 [2021-08-21 18:01:43,831 INFO L226 Difference]: Without dead ends: 174114 [2021-08-21 18:01:43,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:01:44,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174114 states. [2021-08-21 18:01:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174114 to 167754. [2021-08-21 18:01:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167754 states, 167753 states have (on average 1.267762722574261) internal successors, (212671), 167753 states have internal predecessors, (212671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167754 states to 167754 states and 212671 transitions. [2021-08-21 18:01:47,409 INFO L78 Accepts]: Start accepts. Automaton has 167754 states and 212671 transitions. Word has length 96 [2021-08-21 18:01:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:47,410 INFO L470 AbstractCegarLoop]: Abstraction has 167754 states and 212671 transitions. [2021-08-21 18:01:47,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 167754 states and 212671 transitions. [2021-08-21 18:01:47,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:47,661 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:47,661 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:47,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:47,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:47,873 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:47,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:47,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2113502878, now seen corresponding path program 110 times [2021-08-21 18:01:47,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:47,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082491027] [2021-08-21 18:01:47,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:47,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:48,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:48,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082491027] [2021-08-21 18:01:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082491027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:48,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225205902] [2021-08-21 18:01:48,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:48,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:48,386 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) [2021-08-21 18:01:48,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 18:01:51,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:51,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:51,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:01:51,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225205902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:51,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:51,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 18:01:51,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392799534] [2021-08-21 18:01:51,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:01:51,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:51,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:01:51,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:01:51,537 INFO L87 Difference]: Start difference. First operand 167754 states and 212671 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:52,333 INFO L93 Difference]: Finished difference Result 171570 states and 216584 transitions. [2021-08-21 18:01:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:01:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:01:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:52,688 INFO L225 Difference]: With dead ends: 171570 [2021-08-21 18:01:52,688 INFO L226 Difference]: Without dead ends: 171570 [2021-08-21 18:01:52,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:01:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171570 states. [2021-08-21 18:01:55,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171570 to 167322. [2021-08-21 18:01:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167322 states, 167321 states have (on average 1.2672348360337315) internal successors, (212035), 167321 states have internal predecessors, (212035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167322 states to 167322 states and 212035 transitions. [2021-08-21 18:01:55,552 INFO L78 Accepts]: Start accepts. Automaton has 167322 states and 212035 transitions. Word has length 96 [2021-08-21 18:01:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:55,553 INFO L470 AbstractCegarLoop]: Abstraction has 167322 states and 212035 transitions. [2021-08-21 18:01:55,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 167322 states and 212035 transitions. [2021-08-21 18:01:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:01:56,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:56,096 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:56,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:56,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:56,315 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:01:56,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:56,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1906486848, now seen corresponding path program 111 times [2021-08-21 18:01:56,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:56,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696817851] [2021-08-21 18:01:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:56,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:56,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:56,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696817851] [2021-08-21 18:01:56,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696817851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:56,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010984427] [2021-08-21 18:01:56,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:56,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:56,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:56,431 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) [2021-08-21 18:01:56,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 18:01:59,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-21 18:01:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:01:59,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:59,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010984427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:59,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:59,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 18:01:59,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203198876] [2021-08-21 18:01:59,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:01:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:59,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:01:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:01:59,543 INFO L87 Difference]: Start difference. First operand 167322 states and 212035 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:00,297 INFO L93 Difference]: Finished difference Result 174254 states and 222192 transitions. [2021-08-21 18:02:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:02:00,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:00,659 INFO L225 Difference]: With dead ends: 174254 [2021-08-21 18:02:00,659 INFO L226 Difference]: Without dead ends: 174254 [2021-08-21 18:02:00,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:02:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174254 states. [2021-08-21 18:02:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174254 to 161230. [2021-08-21 18:02:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161230 states, 161229 states have (on average 1.2675821347276235) internal successors, (204371), 161229 states have internal predecessors, (204371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161230 states to 161230 states and 204371 transitions. [2021-08-21 18:02:03,760 INFO L78 Accepts]: Start accepts. Automaton has 161230 states and 204371 transitions. Word has length 96 [2021-08-21 18:02:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:03,760 INFO L470 AbstractCegarLoop]: Abstraction has 161230 states and 204371 transitions. [2021-08-21 18:02:03,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 161230 states and 204371 transitions. [2021-08-21 18:02:04,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:04,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:04,375 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:04,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:04,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:04,600 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1694864160, now seen corresponding path program 112 times [2021-08-21 18:02:04,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:04,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865483750] [2021-08-21 18:02:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:04,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:02:04,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:04,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865483750] [2021-08-21 18:02:04,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865483750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:04,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476144453] [2021-08-21 18:02:04,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:04,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:04,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:04,717 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) [2021-08-21 18:02:04,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 18:02:07,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:07,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:07,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:02:08,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476144453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:08,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:08,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:02:08,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805618646] [2021-08-21 18:02:08,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:02:08,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:08,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:02:08,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:02:08,008 INFO L87 Difference]: Start difference. First operand 161230 states and 204371 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:08,610 INFO L93 Difference]: Finished difference Result 173786 states and 219485 transitions. [2021-08-21 18:02:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:02:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:08,962 INFO L225 Difference]: With dead ends: 173786 [2021-08-21 18:02:08,962 INFO L226 Difference]: Without dead ends: 173738 [2021-08-21 18:02:08,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:02:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173738 states. [2021-08-21 18:02:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173738 to 168022. [2021-08-21 18:02:11,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168022 states, 168021 states have (on average 1.2675975026931157) internal successors, (212983), 168021 states have internal predecessors, (212983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168022 states to 168022 states and 212983 transitions. [2021-08-21 18:02:12,314 INFO L78 Accepts]: Start accepts. Automaton has 168022 states and 212983 transitions. Word has length 96 [2021-08-21 18:02:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:12,314 INFO L470 AbstractCegarLoop]: Abstraction has 168022 states and 212983 transitions. [2021-08-21 18:02:12,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 168022 states and 212983 transitions. [2021-08-21 18:02:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:12,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:12,530 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:12,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:12,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:12,757 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1941028700, now seen corresponding path program 113 times [2021-08-21 18:02:12,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:12,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341334099] [2021-08-21 18:02:12,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:12,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:12,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:12,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341334099] [2021-08-21 18:02:12,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341334099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:12,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082471966] [2021-08-21 18:02:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:12,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:12,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:12,866 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) [2021-08-21 18:02:12,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 18:02:15,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 18:02:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:15,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:15,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:16,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082471966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:16,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:16,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:02:16,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329594680] [2021-08-21 18:02:16,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:02:16,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:02:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:02:16,247 INFO L87 Difference]: Start difference. First operand 168022 states and 212983 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:16,862 INFO L93 Difference]: Finished difference Result 177472 states and 224058 transitions. [2021-08-21 18:02:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:02:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:17,358 INFO L225 Difference]: With dead ends: 177472 [2021-08-21 18:02:17,358 INFO L226 Difference]: Without dead ends: 177464 [2021-08-21 18:02:17,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:02:17,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177464 states. [2021-08-21 18:02:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177464 to 167670. [2021-08-21 18:02:20,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167670 states, 167669 states have (on average 1.2664893331504332) internal successors, (212351), 167669 states have internal predecessors, (212351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167670 states to 167670 states and 212351 transitions. [2021-08-21 18:02:20,494 INFO L78 Accepts]: Start accepts. Automaton has 167670 states and 212351 transitions. Word has length 96 [2021-08-21 18:02:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:20,494 INFO L470 AbstractCegarLoop]: Abstraction has 167670 states and 212351 transitions. [2021-08-21 18:02:20,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 167670 states and 212351 transitions. [2021-08-21 18:02:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:20,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:20,708 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:20,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-21 18:02:20,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:20,926 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash -283390134, now seen corresponding path program 114 times [2021-08-21 18:02:20,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:20,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640070553] [2021-08-21 18:02:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:20,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:21,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:21,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640070553] [2021-08-21 18:02:21,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640070553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:21,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913386397] [2021-08-21 18:02:21,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:21,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:21,019 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) [2021-08-21 18:02:21,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 18:02:24,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-21 18:02:24,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:24,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:24,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:24,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913386397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:24,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:24,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:02:24,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380395524] [2021-08-21 18:02:24,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:02:24,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:24,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:02:24,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:02:24,489 INFO L87 Difference]: Start difference. First operand 167670 states and 212351 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:25,218 INFO L93 Difference]: Finished difference Result 171410 states and 217151 transitions. [2021-08-21 18:02:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:02:25,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:25,501 INFO L225 Difference]: With dead ends: 171410 [2021-08-21 18:02:25,501 INFO L226 Difference]: Without dead ends: 171410 [2021-08-21 18:02:25,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:02:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171410 states. [2021-08-21 18:02:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171410 to 167670. [2021-08-21 18:02:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167670 states, 167669 states have (on average 1.2664893331504332) internal successors, (212351), 167669 states have internal predecessors, (212351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:28,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167670 states to 167670 states and 212351 transitions. [2021-08-21 18:02:28,608 INFO L78 Accepts]: Start accepts. Automaton has 167670 states and 212351 transitions. Word has length 96 [2021-08-21 18:02:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 167670 states and 212351 transitions. [2021-08-21 18:02:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 167670 states and 212351 transitions. [2021-08-21 18:02:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:28,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:28,795 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:28,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:29,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-21 18:02:29,009 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:29,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash 106813792, now seen corresponding path program 115 times [2021-08-21 18:02:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:29,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227076723] [2021-08-21 18:02:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:29,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:29,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:29,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227076723] [2021-08-21 18:02:29,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227076723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:29,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784339876] [2021-08-21 18:02:29,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:29,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:29,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:29,549 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) [2021-08-21 18:02:29,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 18:02:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:32,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784339876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:32,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:32,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 18:02:32,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6106522] [2021-08-21 18:02:32,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:02:32,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:02:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:02:32,743 INFO L87 Difference]: Start difference. First operand 167670 states and 212351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:33,367 INFO L93 Difference]: Finished difference Result 174210 states and 222751 transitions. [2021-08-21 18:02:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:02:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:33,655 INFO L225 Difference]: With dead ends: 174210 [2021-08-21 18:02:33,655 INFO L226 Difference]: Without dead ends: 174210 [2021-08-21 18:02:33,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:02:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174210 states. [2021-08-21 18:02:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174210 to 167670. [2021-08-21 18:02:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167670 states, 167669 states have (on average 1.2664893331504332) internal successors, (212351), 167669 states have internal predecessors, (212351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167670 states to 167670 states and 212351 transitions. [2021-08-21 18:02:37,567 INFO L78 Accepts]: Start accepts. Automaton has 167670 states and 212351 transitions. Word has length 96 [2021-08-21 18:02:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:37,567 INFO L470 AbstractCegarLoop]: Abstraction has 167670 states and 212351 transitions. [2021-08-21 18:02:37,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 167670 states and 212351 transitions. [2021-08-21 18:02:37,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:37,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:37,763 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:37,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:37,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 18:02:37,977 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1559678722, now seen corresponding path program 116 times [2021-08-21 18:02:37,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:37,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259837487] [2021-08-21 18:02:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:37,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:38,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259837487] [2021-08-21 18:02:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259837487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:38,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070945223] [2021-08-21 18:02:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:38,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:38,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:38,118 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) [2021-08-21 18:02:38,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 18:02:41,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:41,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:41,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:41,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:41,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070945223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:41,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:41,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:02:41,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918176519] [2021-08-21 18:02:41,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:02:41,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:02:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:02:41,488 INFO L87 Difference]: Start difference. First operand 167670 states and 212351 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:42,134 INFO L93 Difference]: Finished difference Result 174506 states and 223343 transitions. [2021-08-21 18:02:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:02:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:42,831 INFO L225 Difference]: With dead ends: 174506 [2021-08-21 18:02:42,831 INFO L226 Difference]: Without dead ends: 174506 [2021-08-21 18:02:42,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:02:42,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174506 states. [2021-08-21 18:02:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174506 to 167670. [2021-08-21 18:02:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167670 states, 167669 states have (on average 1.2664893331504332) internal successors, (212351), 167669 states have internal predecessors, (212351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:45,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167670 states to 167670 states and 212351 transitions. [2021-08-21 18:02:45,892 INFO L78 Accepts]: Start accepts. Automaton has 167670 states and 212351 transitions. Word has length 96 [2021-08-21 18:02:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:45,892 INFO L470 AbstractCegarLoop]: Abstraction has 167670 states and 212351 transitions. [2021-08-21 18:02:45,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 167670 states and 212351 transitions. [2021-08-21 18:02:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:46,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:46,098 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:46,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:46,319 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,SelfDestructingSolverStorable124 [2021-08-21 18:02:46,320 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash -301792544, now seen corresponding path program 117 times [2021-08-21 18:02:46,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:46,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285672428] [2021-08-21 18:02:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:46,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:46,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:46,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285672428] [2021-08-21 18:02:46,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285672428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:46,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824201484] [2021-08-21 18:02:46,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:02:46,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:46,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:46,783 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) [2021-08-21 18:02:46,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 18:02:49,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 18:02:49,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:49,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:49,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824201484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:49,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:49,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 18:02:49,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882342706] [2021-08-21 18:02:49,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:02:49,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:02:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:02:49,934 INFO L87 Difference]: Start difference. First operand 167670 states and 212351 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:50,692 INFO L93 Difference]: Finished difference Result 173058 states and 220447 transitions. [2021-08-21 18:02:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:02:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:51,023 INFO L225 Difference]: With dead ends: 173058 [2021-08-21 18:02:51,023 INFO L226 Difference]: Without dead ends: 173058 [2021-08-21 18:02:51,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=318, Invalid=552, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:02:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173058 states. [2021-08-21 18:02:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173058 to 167670. [2021-08-21 18:02:54,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167670 states, 167669 states have (on average 1.2664893331504332) internal successors, (212351), 167669 states have internal predecessors, (212351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167670 states to 167670 states and 212351 transitions. [2021-08-21 18:02:54,307 INFO L78 Accepts]: Start accepts. Automaton has 167670 states and 212351 transitions. Word has length 96 [2021-08-21 18:02:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:54,308 INFO L470 AbstractCegarLoop]: Abstraction has 167670 states and 212351 transitions. [2021-08-21 18:02:54,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:54,308 INFO L276 IsEmpty]: Start isEmpty. Operand 167670 states and 212351 transitions. [2021-08-21 18:02:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:02:54,847 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:54,847 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:54,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:55,072 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,SelfDestructingSolverStorable125 [2021-08-21 18:02:55,072 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:02:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:55,073 INFO L82 PathProgramCache]: Analyzing trace with hash -26814974, now seen corresponding path program 118 times [2021-08-21 18:02:55,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:55,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291988278] [2021-08-21 18:02:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:55,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:55,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:55,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291988278] [2021-08-21 18:02:55,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291988278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:55,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574687522] [2021-08-21 18:02:55,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:55,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:55,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:55,192 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) [2021-08-21 18:02:55,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 18:02:58,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:58,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:02:58,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:02:58,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574687522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:58,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:58,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 18:02:58,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989708529] [2021-08-21 18:02:58,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:02:58,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:58,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:02:58,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:02:58,586 INFO L87 Difference]: Start difference. First operand 167670 states and 212351 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:59,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:59,212 INFO L93 Difference]: Finished difference Result 170442 states and 215208 transitions. [2021-08-21 18:02:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:02:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:02:59,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:59,758 INFO L225 Difference]: With dead ends: 170442 [2021-08-21 18:02:59,759 INFO L226 Difference]: Without dead ends: 170442 [2021-08-21 18:02:59,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:02:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170442 states. [2021-08-21 18:03:01,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170442 to 167014. [2021-08-21 18:03:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167014 states, 167013 states have (on average 1.2654284397022986) internal successors, (211343), 167013 states have internal predecessors, (211343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167014 states to 167014 states and 211343 transitions. [2021-08-21 18:03:02,618 INFO L78 Accepts]: Start accepts. Automaton has 167014 states and 211343 transitions. Word has length 96 [2021-08-21 18:03:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:02,619 INFO L470 AbstractCegarLoop]: Abstraction has 167014 states and 211343 transitions. [2021-08-21 18:03:02,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 167014 states and 211343 transitions. [2021-08-21 18:03:02,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:02,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:02,821 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:02,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:03,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:03,045 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1583500384, now seen corresponding path program 119 times [2021-08-21 18:03:03,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:03,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167881240] [2021-08-21 18:03:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:03,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:03,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:03,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167881240] [2021-08-21 18:03:03,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167881240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:03,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402069698] [2021-08-21 18:03:03,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:03:03,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:03,166 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) [2021-08-21 18:03:03,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 18:03:06,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-21 18:03:06,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:06,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402069698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:06,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:06,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-08-21 18:03:06,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575895804] [2021-08-21 18:03:06,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:03:06,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:06,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:03:06,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:03:06,806 INFO L87 Difference]: Start difference. First operand 167014 states and 211343 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:07,638 INFO L93 Difference]: Finished difference Result 172386 states and 219416 transitions. [2021-08-21 18:03:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:03:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:07,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:07,994 INFO L225 Difference]: With dead ends: 172386 [2021-08-21 18:03:07,994 INFO L226 Difference]: Without dead ends: 172386 [2021-08-21 18:03:07,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:03:08,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172386 states. [2021-08-21 18:03:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172386 to 153538. [2021-08-21 18:03:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153538 states, 153537 states have (on average 1.267101740948436) internal successors, (194547), 153537 states have internal predecessors, (194547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153538 states to 153538 states and 194547 transitions. [2021-08-21 18:03:11,136 INFO L78 Accepts]: Start accepts. Automaton has 153538 states and 194547 transitions. Word has length 96 [2021-08-21 18:03:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:11,136 INFO L470 AbstractCegarLoop]: Abstraction has 153538 states and 194547 transitions. [2021-08-21 18:03:11,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 153538 states and 194547 transitions. [2021-08-21 18:03:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:11,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:11,326 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:11,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:11,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:11,553 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1122456960, now seen corresponding path program 120 times [2021-08-21 18:03:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:11,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039486217] [2021-08-21 18:03:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:11,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:03:12,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:12,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039486217] [2021-08-21 18:03:12,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039486217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:12,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234858364] [2021-08-21 18:03:12,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:03:12,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:12,064 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) [2021-08-21 18:03:12,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 18:03:15,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 18:03:15,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:03:15,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234858364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:15,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:15,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 18:03:15,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841084196] [2021-08-21 18:03:15,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:03:15,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:03:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:03:15,264 INFO L87 Difference]: Start difference. First operand 153538 states and 194547 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:15,887 INFO L93 Difference]: Finished difference Result 170038 states and 213731 transitions. [2021-08-21 18:03:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:03:15,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:15,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:16,176 INFO L225 Difference]: With dead ends: 170038 [2021-08-21 18:03:16,177 INFO L226 Difference]: Without dead ends: 169934 [2021-08-21 18:03:16,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:03:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169934 states. [2021-08-21 18:03:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169934 to 156582. [2021-08-21 18:03:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156582 states, 156581 states have (on average 1.2667373436112939) internal successors, (198347), 156581 states have internal predecessors, (198347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156582 states to 156582 states and 198347 transitions. [2021-08-21 18:03:19,037 INFO L78 Accepts]: Start accepts. Automaton has 156582 states and 198347 transitions. Word has length 96 [2021-08-21 18:03:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:19,037 INFO L470 AbstractCegarLoop]: Abstraction has 156582 states and 198347 transitions. [2021-08-21 18:03:19,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 156582 states and 198347 transitions. [2021-08-21 18:03:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:19,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:19,602 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:19,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:19,827 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,SelfDestructingSolverStorable128 [2021-08-21 18:03:19,827 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:19,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1178734306, now seen corresponding path program 121 times [2021-08-21 18:03:19,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:19,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155438480] [2021-08-21 18:03:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:19,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 18:03:19,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:19,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155438480] [2021-08-21 18:03:19,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155438480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:19,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802991350] [2021-08-21 18:03:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:03:19,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:19,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:19,921 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) [2021-08-21 18:03:19,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 18:03:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 18:03:23,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802991350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:23,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:23,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:03:23,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077158915] [2021-08-21 18:03:23,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:03:23,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:03:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:03:23,312 INFO L87 Difference]: Start difference. First operand 156582 states and 198347 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:23,822 INFO L93 Difference]: Finished difference Result 162674 states and 205050 transitions. [2021-08-21 18:03:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:03:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:24,090 INFO L225 Difference]: With dead ends: 162674 [2021-08-21 18:03:24,090 INFO L226 Difference]: Without dead ends: 162590 [2021-08-21 18:03:24,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:03:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162590 states. [2021-08-21 18:03:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162590 to 156582. [2021-08-21 18:03:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156582 states, 156581 states have (on average 1.266635160076893) internal successors, (198331), 156581 states have internal predecessors, (198331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156582 states to 156582 states and 198331 transitions. [2021-08-21 18:03:26,995 INFO L78 Accepts]: Start accepts. Automaton has 156582 states and 198331 transitions. Word has length 96 [2021-08-21 18:03:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:26,995 INFO L470 AbstractCegarLoop]: Abstraction has 156582 states and 198331 transitions. [2021-08-21 18:03:26,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 156582 states and 198331 transitions. [2021-08-21 18:03:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:27,565 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:27,565 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:27,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:27,780 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,SelfDestructingSolverStorable129 [2021-08-21 18:03:27,781 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1511998430, now seen corresponding path program 122 times [2021-08-21 18:03:27,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:27,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709218998] [2021-08-21 18:03:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:27,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 159 proven. 131 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:03:27,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:27,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709218998] [2021-08-21 18:03:27,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709218998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:27,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497290346] [2021-08-21 18:03:27,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:03:27,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:27,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:27,863 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) [2021-08-21 18:03:27,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 18:03:31,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:03:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:31,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 159 proven. 131 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-21 18:03:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497290346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:31,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:31,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:03:31,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470121572] [2021-08-21 18:03:31,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:03:31,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:03:31,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:03:31,378 INFO L87 Difference]: Start difference. First operand 156582 states and 198331 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:31,890 INFO L93 Difference]: Finished difference Result 168334 states and 212778 transitions. [2021-08-21 18:03:31,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:03:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:32,192 INFO L225 Difference]: With dead ends: 168334 [2021-08-21 18:03:32,192 INFO L226 Difference]: Without dead ends: 168290 [2021-08-21 18:03:32,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:03:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168290 states. [2021-08-21 18:03:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168290 to 164426. [2021-08-21 18:03:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164426 states, 164425 states have (on average 1.2667842481374487) internal successors, (208291), 164425 states have internal predecessors, (208291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164426 states to 164426 states and 208291 transitions. [2021-08-21 18:03:35,574 INFO L78 Accepts]: Start accepts. Automaton has 164426 states and 208291 transitions. Word has length 96 [2021-08-21 18:03:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:35,574 INFO L470 AbstractCegarLoop]: Abstraction has 164426 states and 208291 transitions. [2021-08-21 18:03:35,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:35,575 INFO L276 IsEmpty]: Start isEmpty. Operand 164426 states and 208291 transitions. [2021-08-21 18:03:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:35,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:35,761 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:35,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 18:03:35,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:35,986 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash -635225344, now seen corresponding path program 123 times [2021-08-21 18:03:35,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:35,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880401430] [2021-08-21 18:03:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:35,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 192 proven. 104 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:03:36,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:36,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880401430] [2021-08-21 18:03:36,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880401430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:36,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939740833] [2021-08-21 18:03:36,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:03:36,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:36,066 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) [2021-08-21 18:03:36,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 18:03:39,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-21 18:03:39,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:39,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 192 proven. 104 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 18:03:39,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939740833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:39,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:39,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:03:39,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342940247] [2021-08-21 18:03:39,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:03:39,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:39,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:03:39,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:03:39,833 INFO L87 Difference]: Start difference. First operand 164426 states and 208291 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:40,585 INFO L93 Difference]: Finished difference Result 172100 states and 217519 transitions. [2021-08-21 18:03:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:03:40,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:40,885 INFO L225 Difference]: With dead ends: 172100 [2021-08-21 18:03:40,885 INFO L226 Difference]: Without dead ends: 172052 [2021-08-21 18:03:40,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:03:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172052 states. [2021-08-21 18:03:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172052 to 163586. [2021-08-21 18:03:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163586 states, 163585 states have (on average 1.266980468869395) internal successors, (207259), 163585 states have internal predecessors, (207259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163586 states to 163586 states and 207259 transitions. [2021-08-21 18:03:43,758 INFO L78 Accepts]: Start accepts. Automaton has 163586 states and 207259 transitions. Word has length 96 [2021-08-21 18:03:43,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:43,758 INFO L470 AbstractCegarLoop]: Abstraction has 163586 states and 207259 transitions. [2021-08-21 18:03:43,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:43,758 INFO L276 IsEmpty]: Start isEmpty. Operand 163586 states and 207259 transitions. [2021-08-21 18:03:43,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:43,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:43,942 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:43,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:44,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:44,158 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1983576418, now seen corresponding path program 124 times [2021-08-21 18:03:44,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:44,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353807240] [2021-08-21 18:03:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:44,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:44,655 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 227 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:03:44,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:44,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353807240] [2021-08-21 18:03:44,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353807240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:44,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221618916] [2021-08-21 18:03:44,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:44,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:44,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:44,656 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) [2021-08-21 18:03:44,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 18:03:47,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:03:47,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:47,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 227 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:03:48,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221618916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:48,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:48,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:03:48,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384847453] [2021-08-21 18:03:48,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:03:48,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:03:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:03:48,096 INFO L87 Difference]: Start difference. First operand 163586 states and 207259 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:48,642 INFO L93 Difference]: Finished difference Result 169962 states and 214878 transitions. [2021-08-21 18:03:48,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:03:48,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:48,925 INFO L225 Difference]: With dead ends: 169962 [2021-08-21 18:03:48,926 INFO L226 Difference]: Without dead ends: 169954 [2021-08-21 18:03:48,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:03:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169954 states. [2021-08-21 18:03:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169954 to 165426. [2021-08-21 18:03:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165426 states, 165425 states have (on average 1.2665014356959348) internal successors, (209511), 165425 states have internal predecessors, (209511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165426 states to 165426 states and 209511 transitions. [2021-08-21 18:03:52,167 INFO L78 Accepts]: Start accepts. Automaton has 165426 states and 209511 transitions. Word has length 96 [2021-08-21 18:03:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:52,167 INFO L470 AbstractCegarLoop]: Abstraction has 165426 states and 209511 transitions. [2021-08-21 18:03:52,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 165426 states and 209511 transitions. [2021-08-21 18:03:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:03:52,347 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:52,347 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:52,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:52,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:52,568 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:03:52,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:52,568 INFO L82 PathProgramCache]: Analyzing trace with hash -653752312, now seen corresponding path program 125 times [2021-08-21 18:03:52,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:52,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950416980] [2021-08-21 18:03:52,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:52,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 199 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:03:52,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:52,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950416980] [2021-08-21 18:03:52,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950416980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:52,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304377740] [2021-08-21 18:03:52,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:03:52,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:52,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:52,649 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) [2021-08-21 18:03:52,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 18:03:56,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 18:03:56,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:03:56,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 199 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:03:56,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304377740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:56,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:56,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 18:03:56,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509128114] [2021-08-21 18:03:56,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:03:56,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:03:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:03:56,237 INFO L87 Difference]: Start difference. First operand 165426 states and 209511 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:57,020 INFO L93 Difference]: Finished difference Result 167264 states and 212023 transitions. [2021-08-21 18:03:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:03:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:03:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:57,319 INFO L225 Difference]: With dead ends: 167264 [2021-08-21 18:03:57,319 INFO L226 Difference]: Without dead ends: 167264 [2021-08-21 18:03:57,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:03:57,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167264 states. [2021-08-21 18:03:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167264 to 165426. [2021-08-21 18:04:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165426 states, 165425 states have (on average 1.2665014356959348) internal successors, (209511), 165425 states have internal predecessors, (209511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165426 states to 165426 states and 209511 transitions. [2021-08-21 18:04:00,521 INFO L78 Accepts]: Start accepts. Automaton has 165426 states and 209511 transitions. Word has length 96 [2021-08-21 18:04:00,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:00,521 INFO L470 AbstractCegarLoop]: Abstraction has 165426 states and 209511 transitions. [2021-08-21 18:04:00,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:00,522 INFO L276 IsEmpty]: Start isEmpty. Operand 165426 states and 209511 transitions. [2021-08-21 18:04:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:04:00,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:00,737 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:00,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:00,950 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,SelfDestructingSolverStorable133 [2021-08-21 18:04:00,950 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:00,950 INFO L82 PathProgramCache]: Analyzing trace with hash -263548386, now seen corresponding path program 126 times [2021-08-21 18:04:00,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:00,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41923299] [2021-08-21 18:04:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:00,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:01,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:01,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41923299] [2021-08-21 18:04:01,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41923299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:01,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397334355] [2021-08-21 18:04:01,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:01,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:01,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:01,591 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) [2021-08-21 18:04:01,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-21 18:04:04,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 18:04:04,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:04,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:04:04,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:04,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397334355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:04,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:04,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 18:04:04,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43450168] [2021-08-21 18:04:04,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:04:04,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:04,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:04:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:04:04,999 INFO L87 Difference]: Start difference. First operand 165426 states and 209511 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:05,632 INFO L93 Difference]: Finished difference Result 169064 states and 215623 transitions. [2021-08-21 18:04:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:04:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:04:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:05,923 INFO L225 Difference]: With dead ends: 169064 [2021-08-21 18:04:05,924 INFO L226 Difference]: Without dead ends: 169064 [2021-08-21 18:04:05,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=264, Invalid=438, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:04:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169064 states. [2021-08-21 18:04:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169064 to 165426. [2021-08-21 18:04:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165426 states, 165425 states have (on average 1.2665014356959348) internal successors, (209511), 165425 states have internal predecessors, (209511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165426 states to 165426 states and 209511 transitions. [2021-08-21 18:04:09,232 INFO L78 Accepts]: Start accepts. Automaton has 165426 states and 209511 transitions. Word has length 96 [2021-08-21 18:04:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:09,232 INFO L470 AbstractCegarLoop]: Abstraction has 165426 states and 209511 transitions. [2021-08-21 18:04:09,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 165426 states and 209511 transitions. [2021-08-21 18:04:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:04:09,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:09,449 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:09,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:09,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 18:04:09,663 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:09,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1189316544, now seen corresponding path program 127 times [2021-08-21 18:04:09,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:09,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131624941] [2021-08-21 18:04:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:09,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 187 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:09,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:09,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131624941] [2021-08-21 18:04:09,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131624941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:09,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799639873] [2021-08-21 18:04:09,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:04:09,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:09,763 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) [2021-08-21 18:04:09,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-21 18:04:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:13,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:04:13,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 187 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:13,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799639873] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:13,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:13,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 18:04:13,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179668821] [2021-08-21 18:04:13,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:04:13,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:04:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:04:13,525 INFO L87 Difference]: Start difference. First operand 165426 states and 209511 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:14,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:14,265 INFO L93 Difference]: Finished difference Result 169408 states and 216311 transitions. [2021-08-21 18:04:14,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:14,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:04:14,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:14,584 INFO L225 Difference]: With dead ends: 169408 [2021-08-21 18:04:14,584 INFO L226 Difference]: Without dead ends: 169408 [2021-08-21 18:04:14,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=344, Invalid=586, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:04:14,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169408 states. [2021-08-21 18:04:17,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169408 to 165426. [2021-08-21 18:04:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165426 states, 165425 states have (on average 1.2665014356959348) internal successors, (209511), 165425 states have internal predecessors, (209511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165426 states to 165426 states and 209511 transitions. [2021-08-21 18:04:17,670 INFO L78 Accepts]: Start accepts. Automaton has 165426 states and 209511 transitions. Word has length 96 [2021-08-21 18:04:17,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:17,670 INFO L470 AbstractCegarLoop]: Abstraction has 165426 states and 209511 transitions. [2021-08-21 18:04:17,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:17,670 INFO L276 IsEmpty]: Start isEmpty. Operand 165426 states and 209511 transitions. [2021-08-21 18:04:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:04:17,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:17,874 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:17,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:18,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-21 18:04:18,090 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash -672154722, now seen corresponding path program 128 times [2021-08-21 18:04:18,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:18,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584607061] [2021-08-21 18:04:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:18,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:18,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:18,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584607061] [2021-08-21 18:04:18,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584607061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:18,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025541015] [2021-08-21 18:04:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:04:18,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:18,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:18,589 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) [2021-08-21 18:04:18,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-21 18:04:22,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:04:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:04:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:22,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025541015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:22,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:22,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-21 18:04:22,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179905642] [2021-08-21 18:04:22,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:04:22,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:22,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:04:22,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:04:22,342 INFO L87 Difference]: Start difference. First operand 165426 states and 209511 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:22,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:22,989 INFO L93 Difference]: Finished difference Result 168832 states and 215159 transitions. [2021-08-21 18:04:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:04:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:23,549 INFO L225 Difference]: With dead ends: 168832 [2021-08-21 18:04:23,549 INFO L226 Difference]: Without dead ends: 168832 [2021-08-21 18:04:23,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=388, Invalid=668, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:04:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168832 states. [2021-08-21 18:04:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168832 to 165426. [2021-08-21 18:04:25,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165426 states, 165425 states have (on average 1.2665014356959348) internal successors, (209511), 165425 states have internal predecessors, (209511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165426 states to 165426 states and 209511 transitions. [2021-08-21 18:04:26,366 INFO L78 Accepts]: Start accepts. Automaton has 165426 states and 209511 transitions. Word has length 96 [2021-08-21 18:04:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:26,366 INFO L470 AbstractCegarLoop]: Abstraction has 165426 states and 209511 transitions. [2021-08-21 18:04:26,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 165426 states and 209511 transitions. [2021-08-21 18:04:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:04:26,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:26,567 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:26,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:26,793 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,SelfDestructingSolverStorable136 [2021-08-21 18:04:26,794 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:26,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:26,794 INFO L82 PathProgramCache]: Analyzing trace with hash -397177152, now seen corresponding path program 129 times [2021-08-21 18:04:26,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:26,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12332655] [2021-08-21 18:04:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:26,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 164 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:26,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:26,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12332655] [2021-08-21 18:04:26,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12332655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:26,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025013124] [2021-08-21 18:04:26,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:04:26,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:26,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:26,914 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) [2021-08-21 18:04:26,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-21 18:04:30,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-21 18:04:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:04:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 164 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:30,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025013124] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:30,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:30,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 18:04:30,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837591162] [2021-08-21 18:04:30,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:04:30,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:30,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:04:30,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:04:30,837 INFO L87 Difference]: Start difference. First operand 165426 states and 209511 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:31,498 INFO L93 Difference]: Finished difference Result 167852 states and 213199 transitions. [2021-08-21 18:04:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:04:31,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-08-21 18:04:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:31,792 INFO L225 Difference]: With dead ends: 167852 [2021-08-21 18:04:31,792 INFO L226 Difference]: Without dead ends: 167852 [2021-08-21 18:04:31,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=381, Invalid=675, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:04:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167852 states. [2021-08-21 18:04:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167852 to 165426. [2021-08-21 18:04:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165426 states, 165425 states have (on average 1.2665014356959348) internal successors, (209511), 165425 states have internal predecessors, (209511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165426 states to 165426 states and 209511 transitions. [2021-08-21 18:04:34,763 INFO L78 Accepts]: Start accepts. Automaton has 165426 states and 209511 transitions. Word has length 96 [2021-08-21 18:04:34,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:34,763 INFO L470 AbstractCegarLoop]: Abstraction has 165426 states and 209511 transitions. [2021-08-21 18:04:34,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 165426 states and 209511 transitions. [2021-08-21 18:04:34,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-21 18:04:34,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:34,954 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:34,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:35,169 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 18:04:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1213138206, now seen corresponding path program 130 times [2021-08-21 18:04:35,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:35,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576962493] [2021-08-21 18:04:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:35,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 152 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:35,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:35,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576962493] [2021-08-21 18:04:35,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576962493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:35,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224600967] [2021-08-21 18:04:35,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:04:35,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:35,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:35,282 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) [2021-08-21 18:04:35,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-21 18:04:38,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:04:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:04:38,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 152 proven. 148 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:04:39,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224600967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:39,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:39,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-08-21 18:04:39,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817604051] [2021-08-21 18:04:39,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:04:39,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:39,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:04:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:04:39,201 INFO L87 Difference]: Start difference. First operand 165426 states and 209511 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)