/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/parallel-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:57:43,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:57:43,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:57:43,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:57:43,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:57:43,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:57:43,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:57:43,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:57:43,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:57:43,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:57:43,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:57:43,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:57:43,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:57:43,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:57:43,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:57:43,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:57:43,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:57:43,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:57:43,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:57:43,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:57:43,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:57:43,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:57:43,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:57:43,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:57:43,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 17:57:43,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:57:43,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:57:43,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:57:43,540 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 17:57:43,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:57:43,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:57:43,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:57:43,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:57:43,556 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:57:43,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:57:43,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:57:43,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:57:43,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:57:43,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:57:43,559 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:57:43,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:57:43,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:57:43,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:57:43,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:57:43,827 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:57:43,828 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:57:43,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-08-21 17:57:43,828 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-08-21 17:57:43,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:57:43,854 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:57:43,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:57:43,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:57:43,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:57:43,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,868 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:57:43,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:57:43,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:57:43,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:57:43,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:57:43,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:57:43,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:57:43,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:57:43,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/1) ... [2021-08-21 17:57:43,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:57:43,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:43,921 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 17:57:43,925 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 17:57:43,954 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:57:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:57:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:57:43,955 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:57:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:57:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:57:43,955 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:57:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:57:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:57:43,955 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 17:57:43,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 17:57:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 17:57:43,956 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-21 17:57:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-21 17:57:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-21 17:57:43,956 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-21 17:57:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-21 17:57:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-21 17:57:43,956 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-21 17:57:43,956 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-21 17:57:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-21 17:57:43,957 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 17:57:44,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:57:44,201 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-21 17:57:44,201 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 17:57:44,202 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-21 17:57:44,202 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-08-21 17:57:44,202 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-08-21 17:57:44,203 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:57:44 BoogieIcfgContainer [2021-08-21 17:57:44,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:57:44,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:57:44,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:57:44,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:57:44,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:57:43" (1/2) ... [2021-08-21 17:57:44,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d103e3b and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:57:44, skipping insertion in model container [2021-08-21 17:57:44,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:57:44" (2/2) ... [2021-08-21 17:57:44,222 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-08-21 17:57:44,225 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:57:44,225 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:57:44,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:57:44,226 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:57:44,349 INFO L148 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-08-21 17:57:44,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:57:44,392 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 17:57:44,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-21 17:57:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 445 states, 313 states have (on average 2.3003194888178915) internal successors, (720), 444 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:57:44,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:44,592 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:44,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:44,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:44,596 INFO L82 PathProgramCache]: Analyzing trace with hash -556425893, now seen corresponding path program 1 times [2021-08-21 17:57:44,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:44,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669383988] [2021-08-21 17:57:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:44,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:44,793 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 17:57:44,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:44,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669383988] [2021-08-21 17:57:44,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669383988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:57:44,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:57:44,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:57:44,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227085107] [2021-08-21 17:57:44,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:57:44,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:44,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:57:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:57:44,811 INFO L87 Difference]: Start difference. First operand has 445 states, 313 states have (on average 2.3003194888178915) internal successors, (720), 444 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:44,910 INFO L93 Difference]: Finished difference Result 884 states and 1432 transitions. [2021-08-21 17:57:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:57:44,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 17:57:44,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:44,919 INFO L225 Difference]: With dead ends: 884 [2021-08-21 17:57:44,919 INFO L226 Difference]: Without dead ends: 107 [2021-08-21 17:57:44,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:57:44,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-21 17:57:44,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-08-21 17:57:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.130434782608696) internal successors, (147), 69 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:44,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 147 transitions. [2021-08-21 17:57:44,945 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 147 transitions. Word has length 25 [2021-08-21 17:57:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:44,945 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 147 transitions. [2021-08-21 17:57:44,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 147 transitions. [2021-08-21 17:57:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:57:44,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:44,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:57:44,951 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:44,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:44,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1946516486, now seen corresponding path program 1 times [2021-08-21 17:57:44,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:44,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626888288] [2021-08-21 17:57:44,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:44,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:45,001 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 17:57:45,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:45,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626888288] [2021-08-21 17:57:45,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626888288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:45,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606513894] [2021-08-21 17:57:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:45,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:45,003 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 17:57:45,042 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 17:57:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:45,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:57:45,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:45,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606513894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:45,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:45,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 17:57:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349402828] [2021-08-21 17:57:45,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:57:45,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:45,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:57:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:57:45,239 INFO L87 Difference]: Start difference. First operand 70 states and 147 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:45,273 INFO L93 Difference]: Finished difference Result 91 states and 202 transitions. [2021-08-21 17:57:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:57:45,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:57:45,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:45,277 INFO L225 Difference]: With dead ends: 91 [2021-08-21 17:57:45,277 INFO L226 Difference]: Without dead ends: 82 [2021-08-21 17:57:45,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:57:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-21 17:57:45,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-08-21 17:57:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2567567567567566) internal successors, (167), 74 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 167 transitions. [2021-08-21 17:57:45,289 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 167 transitions. Word has length 27 [2021-08-21 17:57:45,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:45,289 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 167 transitions. [2021-08-21 17:57:45,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,289 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 167 transitions. [2021-08-21 17:57:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:57:45,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:45,290 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:45,314 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 17:57:45,507 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 17:57:45,507 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash -35108198, now seen corresponding path program 1 times [2021-08-21 17:57:45,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:45,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949854572] [2021-08-21 17:57:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:45,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:45,547 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 17:57:45,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:45,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949854572] [2021-08-21 17:57:45,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949854572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:45,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924888376] [2021-08-21 17:57:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:45,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:45,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:45,549 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 17:57:45,552 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 17:57:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:45,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 17:57:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:45,717 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 17:57:45,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924888376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:45,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:45,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 17:57:45,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375575518] [2021-08-21 17:57:45,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:57:45,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:57:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:57:45,718 INFO L87 Difference]: Start difference. First operand 75 states and 167 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:45,744 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2021-08-21 17:57:45,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:57:45,745 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-21 17:57:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:45,746 INFO L225 Difference]: With dead ends: 101 [2021-08-21 17:57:45,746 INFO L226 Difference]: Without dead ends: 90 [2021-08-21 17:57:45,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:57:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-21 17:57:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-21 17:57:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.348314606741573) internal successors, (209), 89 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 209 transitions. [2021-08-21 17:57:45,749 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 209 transitions. Word has length 27 [2021-08-21 17:57:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:45,750 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 209 transitions. [2021-08-21 17:57:45,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 209 transitions. [2021-08-21 17:57:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:45,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:45,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:45,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 17:57:45,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-21 17:57:45,968 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:45,968 INFO L82 PathProgramCache]: Analyzing trace with hash -177339015, now seen corresponding path program 1 times [2021-08-21 17:57:45,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:45,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997251760] [2021-08-21 17:57:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:45,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:46,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:46,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997251760] [2021-08-21 17:57:46,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997251760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:46,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875254245] [2021-08-21 17:57:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:46,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:46,159 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 17:57:46,200 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 17:57:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:46,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 17:57:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:46,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875254245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:46,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:46,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 17:57:46,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845349197] [2021-08-21 17:57:46,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:57:46,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:57:46,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:46,703 INFO L87 Difference]: Start difference. First operand 90 states and 209 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:47,306 INFO L93 Difference]: Finished difference Result 290 states and 657 transitions. [2021-08-21 17:57:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:57:47,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 29 [2021-08-21 17:57:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:47,308 INFO L225 Difference]: With dead ends: 290 [2021-08-21 17:57:47,308 INFO L226 Difference]: Without dead ends: 264 [2021-08-21 17:57:47,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:57:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-08-21 17:57:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 117. [2021-08-21 17:57:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.543103448275862) internal successors, (295), 116 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 295 transitions. [2021-08-21 17:57:47,314 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 295 transitions. Word has length 29 [2021-08-21 17:57:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:47,314 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 295 transitions. [2021-08-21 17:57:47,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 295 transitions. [2021-08-21 17:57:47,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:47,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:47,315 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:47,332 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 17:57:47,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:47,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2070848679, now seen corresponding path program 1 times [2021-08-21 17:57:47,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:47,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607941959] [2021-08-21 17:57:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:47,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:47,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:47,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607941959] [2021-08-21 17:57:47,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607941959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:47,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015247279] [2021-08-21 17:57:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:47,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:47,722 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 17:57:47,723 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 17:57:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:47,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:48,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-21 17:57:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:48,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015247279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:48,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:48,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 17:57:48,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747893473] [2021-08-21 17:57:48,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:57:48,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:48,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:57:48,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:48,252 INFO L87 Difference]: Start difference. First operand 117 states and 295 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:48,812 INFO L93 Difference]: Finished difference Result 293 states and 676 transitions. [2021-08-21 17:57:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:57:48,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 29 [2021-08-21 17:57:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:48,814 INFO L225 Difference]: With dead ends: 293 [2021-08-21 17:57:48,814 INFO L226 Difference]: Without dead ends: 267 [2021-08-21 17:57:48,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:57:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-21 17:57:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 129. [2021-08-21 17:57:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.5703125) internal successors, (329), 128 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 329 transitions. [2021-08-21 17:57:48,820 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 329 transitions. Word has length 29 [2021-08-21 17:57:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:48,820 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 329 transitions. [2021-08-21 17:57:48,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 329 transitions. [2021-08-21 17:57:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:48,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:48,821 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:48,839 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 17:57:49,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:49,022 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1007176121, now seen corresponding path program 2 times [2021-08-21 17:57:49,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:49,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538560426] [2021-08-21 17:57:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:49,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:49,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:49,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538560426] [2021-08-21 17:57:49,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538560426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:49,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465027747] [2021-08-21 17:57:49,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:49,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:49,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:49,194 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 17:57:49,235 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 17:57:49,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:49,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:49,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:49,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:57:49,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-21 17:57:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:49,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465027747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:49,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:49,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:57:49,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066211226] [2021-08-21 17:57:49,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:57:49,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:57:49,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:57:49,907 INFO L87 Difference]: Start difference. First operand 129 states and 329 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:50,227 INFO L93 Difference]: Finished difference Result 205 states and 511 transitions. [2021-08-21 17:57:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:57:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:57:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:50,229 INFO L225 Difference]: With dead ends: 205 [2021-08-21 17:57:50,229 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 17:57:50,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:57:50,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 17:57:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 135. [2021-08-21 17:57:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.5970149253731343) internal successors, (348), 134 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 348 transitions. [2021-08-21 17:57:50,233 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 348 transitions. Word has length 29 [2021-08-21 17:57:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:50,234 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 348 transitions. [2021-08-21 17:57:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 348 transitions. [2021-08-21 17:57:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:50,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:50,234 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:50,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-21 17:57:50,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:50,450 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash 414756185, now seen corresponding path program 1 times [2021-08-21 17:57:50,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:50,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944216177] [2021-08-21 17:57:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:50,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:50,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:50,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944216177] [2021-08-21 17:57:50,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944216177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:50,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651274636] [2021-08-21 17:57:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:50,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:50,595 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 17:57:50,596 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 17:57:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:50,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:50,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-21 17:57:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:51,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651274636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:51,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:51,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 17:57:51,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229098453] [2021-08-21 17:57:51,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:57:51,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:57:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:51,157 INFO L87 Difference]: Start difference. First operand 135 states and 348 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:51,672 INFO L93 Difference]: Finished difference Result 301 states and 723 transitions. [2021-08-21 17:57:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:57:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 29 [2021-08-21 17:57:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:51,677 INFO L225 Difference]: With dead ends: 301 [2021-08-21 17:57:51,677 INFO L226 Difference]: Without dead ends: 275 [2021-08-21 17:57:51,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-21 17:57:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-21 17:57:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 152. [2021-08-21 17:57:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.6887417218543046) internal successors, (406), 151 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 406 transitions. [2021-08-21 17:57:51,683 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 406 transitions. Word has length 29 [2021-08-21 17:57:51,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:51,683 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 406 transitions. [2021-08-21 17:57:51,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 406 transitions. [2021-08-21 17:57:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:51,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:51,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:51,704 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 17:57:51,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:51,895 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1587858469, now seen corresponding path program 3 times [2021-08-21 17:57:51,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:51,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398856341] [2021-08-21 17:57:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:51,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:52,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398856341] [2021-08-21 17:57:52,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398856341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148541751] [2021-08-21 17:57:52,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:52,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:52,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:52,051 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 17:57:52,053 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 17:57:52,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:57:52,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:52,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:52,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:57:52,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-21 17:57:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:52,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148541751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:52,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:52,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:57:52,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215936202] [2021-08-21 17:57:52,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:57:52,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:57:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:57:52,803 INFO L87 Difference]: Start difference. First operand 152 states and 406 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:53,157 INFO L93 Difference]: Finished difference Result 214 states and 546 transitions. [2021-08-21 17:57:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:57:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:53,159 INFO L225 Difference]: With dead ends: 214 [2021-08-21 17:57:53,159 INFO L226 Difference]: Without dead ends: 201 [2021-08-21 17:57:53,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:57:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-08-21 17:57:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2021-08-21 17:57:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.673202614379085) internal successors, (409), 153 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2021-08-21 17:57:53,163 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 29 [2021-08-21 17:57:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:53,163 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2021-08-21 17:57:53,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2021-08-21 17:57:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:53,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:53,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:53,181 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 17:57:53,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:53,375 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash 919962299, now seen corresponding path program 2 times [2021-08-21 17:57:53,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:53,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479912949] [2021-08-21 17:57:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:53,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:53,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:53,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479912949] [2021-08-21 17:57:53,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479912949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:53,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489756269] [2021-08-21 17:57:53,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:53,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:53,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:53,533 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 17:57:53,534 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 17:57:53,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:53,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:53,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:57:53,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-21 17:57:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:54,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489756269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:54,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:54,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:57:54,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989144343] [2021-08-21 17:57:54,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:57:54,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:54,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:57:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:57:54,329 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:54,694 INFO L93 Difference]: Finished difference Result 216 states and 550 transitions. [2021-08-21 17:57:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:57:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:54,696 INFO L225 Difference]: With dead ends: 216 [2021-08-21 17:57:54,696 INFO L226 Difference]: Without dead ends: 203 [2021-08-21 17:57:54,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:57:54,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-08-21 17:57:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 160. [2021-08-21 17:57:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.6729559748427674) internal successors, (425), 159 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 425 transitions. [2021-08-21 17:57:54,700 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 425 transitions. Word has length 29 [2021-08-21 17:57:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:54,701 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 425 transitions. [2021-08-21 17:57:54,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 425 transitions. [2021-08-21 17:57:54,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:54,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:54,702 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:54,719 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 17:57:54,915 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,SelfDestructingSolverStorable8 [2021-08-21 17:57:54,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2077973849, now seen corresponding path program 3 times [2021-08-21 17:57:54,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:54,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423139664] [2021-08-21 17:57:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:54,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:55,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:55,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423139664] [2021-08-21 17:57:55,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423139664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:55,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532637046] [2021-08-21 17:57:55,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:55,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:55,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:55,054 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 17:57:55,054 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 17:57:55,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:57:55,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:55,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:55,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:57:55,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-21 17:57:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:55,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532637046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:55,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:55,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:57:55,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920491010] [2021-08-21 17:57:55,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:57:55,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:57:55,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:57:55,848 INFO L87 Difference]: Start difference. First operand 160 states and 425 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:56,254 INFO L93 Difference]: Finished difference Result 238 states and 595 transitions. [2021-08-21 17:57:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:57:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:57:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:56,256 INFO L225 Difference]: With dead ends: 238 [2021-08-21 17:57:56,256 INFO L226 Difference]: Without dead ends: 225 [2021-08-21 17:57:56,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 367.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:57:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-21 17:57:56,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 166. [2021-08-21 17:57:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.703030303030303) internal successors, (446), 165 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:56,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 446 transitions. [2021-08-21 17:57:56,260 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 446 transitions. Word has length 29 [2021-08-21 17:57:56,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:56,260 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 446 transitions. [2021-08-21 17:57:56,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:56,261 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 446 transitions. [2021-08-21 17:57:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:56,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:56,261 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:56,278 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 17:57:56,464 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,SelfDestructingSolverStorable9 [2021-08-21 17:57:56,465 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:56,465 INFO L82 PathProgramCache]: Analyzing trace with hash 184464185, now seen corresponding path program 1 times [2021-08-21 17:57:56,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:56,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180721480] [2021-08-21 17:57:56,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:56,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:56,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:56,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180721480] [2021-08-21 17:57:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180721480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:56,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368982775] [2021-08-21 17:57:56,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:56,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:56,586 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 17:57:56,587 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 17:57:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:57,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-21 17:57:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:57,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368982775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:57,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:57,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 17:57:57,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854300749] [2021-08-21 17:57:57,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:57:57,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:57:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:57:57,334 INFO L87 Difference]: Start difference. First operand 166 states and 446 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:57,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:57,933 INFO L93 Difference]: Finished difference Result 330 states and 797 transitions. [2021-08-21 17:57:57,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:57:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 29 [2021-08-21 17:57:57,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:57,935 INFO L225 Difference]: With dead ends: 330 [2021-08-21 17:57:57,935 INFO L226 Difference]: Without dead ends: 304 [2021-08-21 17:57:57,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 17:57:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-21 17:57:57,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 171. [2021-08-21 17:57:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.7294117647058824) internal successors, (464), 170 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 464 transitions. [2021-08-21 17:57:57,939 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 464 transitions. Word has length 29 [2021-08-21 17:57:57,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:57,939 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 464 transitions. [2021-08-21 17:57:57,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 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 17:57:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 464 transitions. [2021-08-21 17:57:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:57,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:57,940 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:57,960 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 17:57:58,148 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,SelfDestructingSolverStorable10 [2021-08-21 17:57:58,149 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:58,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:58,149 INFO L82 PathProgramCache]: Analyzing trace with hash 415098233, now seen corresponding path program 2 times [2021-08-21 17:57:58,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:58,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108985925] [2021-08-21 17:57:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:58,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:58,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:58,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108985925] [2021-08-21 17:57:58,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108985925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:58,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197598334] [2021-08-21 17:57:58,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:57:58,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:58,277 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 17:57:58,312 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 17:57:58,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:57:58,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:58,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:57:58,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:58,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:57:58,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-21 17:57:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:59,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197598334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:59,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:59,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:57:59,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768116096] [2021-08-21 17:57:59,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:57:59,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:59,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:57:59,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:57:59,145 INFO L87 Difference]: Start difference. First operand 171 states and 464 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:59,467 INFO L93 Difference]: Finished difference Result 227 states and 594 transitions. [2021-08-21 17:57:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:57:59,467 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:57:59,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:59,468 INFO L225 Difference]: With dead ends: 227 [2021-08-21 17:57:59,468 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 17:57:59,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:57:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 17:57:59,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 175. [2021-08-21 17:57:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.735632183908046) internal successors, (476), 174 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 476 transitions. [2021-08-21 17:57:59,474 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 476 transitions. Word has length 29 [2021-08-21 17:57:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:59,474 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 476 transitions. [2021-08-21 17:57:59,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:57:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 476 transitions. [2021-08-21 17:57:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:57:59,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:59,475 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:59,492 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 17:57:59,675 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,SelfDestructingSolverStorable11 [2021-08-21 17:57:59,675 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:57:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:59,676 INFO L82 PathProgramCache]: Analyzing trace with hash -861343717, now seen corresponding path program 3 times [2021-08-21 17:57:59,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:59,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634117266] [2021-08-21 17:57:59,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:59,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:59,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:59,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634117266] [2021-08-21 17:57:59,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634117266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:59,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445797654] [2021-08-21 17:57:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:57:59,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:59,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:59,823 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 17:57:59,847 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 17:58:00,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:58:00,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:00,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:58:00,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:00,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:00,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-21 17:58:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:00,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445797654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:00,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:00,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:58:00,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151652615] [2021-08-21 17:58:00,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:58:00,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:58:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:58:00,734 INFO L87 Difference]: Start difference. First operand 175 states and 476 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:58:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:01,132 INFO L93 Difference]: Finished difference Result 224 states and 582 transitions. [2021-08-21 17:58:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:58:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:58:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:01,133 INFO L225 Difference]: With dead ends: 224 [2021-08-21 17:58:01,133 INFO L226 Difference]: Without dead ends: 211 [2021-08-21 17:58:01,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:01,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-21 17:58:01,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 177. [2021-08-21 17:58:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.727272727272727) internal successors, (480), 176 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:01,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 480 transitions. [2021-08-21 17:58:01,137 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 480 transitions. Word has length 29 [2021-08-21 17:58:01,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:01,137 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 480 transitions. [2021-08-21 17:58:01,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:58:01,137 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 480 transitions. [2021-08-21 17:58:01,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:58:01,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:01,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:01,157 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 17:58:01,349 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,SelfDestructingSolverStorable12 [2021-08-21 17:58:01,349 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash 756380155, now seen corresponding path program 2 times [2021-08-21 17:58:01,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:01,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890894631] [2021-08-21 17:58:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:01,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:01,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:01,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890894631] [2021-08-21 17:58:01,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890894631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:01,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235667001] [2021-08-21 17:58:01,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:01,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:01,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:01,475 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 17:58:01,475 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 17:58:01,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:01,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:01,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:58:01,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:02,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:02,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-21 17:58:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:02,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235667001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:02,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:02,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 17:58:02,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164384932] [2021-08-21 17:58:02,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:58:02,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:58:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:58:02,426 INFO L87 Difference]: Start difference. First operand 177 states and 480 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:58:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:02,760 INFO L93 Difference]: Finished difference Result 222 states and 578 transitions. [2021-08-21 17:58:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:58:02,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 29 [2021-08-21 17:58:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:02,762 INFO L225 Difference]: With dead ends: 222 [2021-08-21 17:58:02,762 INFO L226 Difference]: Without dead ends: 209 [2021-08-21 17:58:02,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-08-21 17:58:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 178. [2021-08-21 17:58:02,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.7231638418079096) internal successors, (482), 177 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 482 transitions. [2021-08-21 17:58:02,765 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 482 transitions. Word has length 29 [2021-08-21 17:58:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:02,766 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 482 transitions. [2021-08-21 17:58:02,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 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 17:58:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 482 transitions. [2021-08-21 17:58:02,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:58:02,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:02,767 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:02,784 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 17:58:02,972 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,SelfDestructingSolverStorable13 [2021-08-21 17:58:02,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1078646045, now seen corresponding path program 3 times [2021-08-21 17:58:02,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:02,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856554222] [2021-08-21 17:58:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:02,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:03,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:03,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856554222] [2021-08-21 17:58:03,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856554222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:03,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562836094] [2021-08-21 17:58:03,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:03,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:03,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:03,107 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 17:58:03,107 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 17:58:03,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:58:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:03,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-21 17:58:03,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:03,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:03,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-21 17:58:03,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:03,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562836094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:03,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:03,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 17:58:03,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414112349] [2021-08-21 17:58:03,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 17:58:03,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:03,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 17:58:03,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 17:58:03,942 INFO L87 Difference]: Start difference. First operand 178 states and 482 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:04,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:04,125 INFO L93 Difference]: Finished difference Result 227 states and 594 transitions. [2021-08-21 17:58:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:58:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-21 17:58:04,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:04,126 INFO L225 Difference]: With dead ends: 227 [2021-08-21 17:58:04,126 INFO L226 Difference]: Without dead ends: 214 [2021-08-21 17:58:04,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:58:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-21 17:58:04,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 178. [2021-08-21 17:58:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.7231638418079096) internal successors, (482), 177 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 482 transitions. [2021-08-21 17:58:04,130 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 482 transitions. Word has length 29 [2021-08-21 17:58:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:04,130 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 482 transitions. [2021-08-21 17:58:04,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 482 transitions. [2021-08-21 17:58:04,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:58:04,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:04,131 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:04,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:04,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:04,345 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:04,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:04,345 INFO L82 PathProgramCache]: Analyzing trace with hash 577799320, now seen corresponding path program 4 times [2021-08-21 17:58:04,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:04,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18374593] [2021-08-21 17:58:04,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:04,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:04,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:04,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18374593] [2021-08-21 17:58:04,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18374593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:04,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859238313] [2021-08-21 17:58:04,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:04,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:04,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:04,383 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 17:58:04,403 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 17:58:04,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:04,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:58:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:05,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859238313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:05,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:05,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 17:58:05,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723270091] [2021-08-21 17:58:05,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:58:05,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:05,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:58:05,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:58:05,018 INFO L87 Difference]: Start difference. First operand 178 states and 482 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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 17:58:05,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:05,106 INFO L93 Difference]: Finished difference Result 371 states and 924 transitions. [2021-08-21 17:58:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:58:05,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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 31 [2021-08-21 17:58:05,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:05,108 INFO L225 Difference]: With dead ends: 371 [2021-08-21 17:58:05,108 INFO L226 Difference]: Without dead ends: 344 [2021-08-21 17:58:05,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:58:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-21 17:58:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 281. [2021-08-21 17:58:05,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.7285714285714286) internal successors, (764), 280 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:05,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 764 transitions. [2021-08-21 17:58:05,113 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 764 transitions. Word has length 31 [2021-08-21 17:58:05,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:05,114 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 764 transitions. [2021-08-21 17:58:05,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 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 17:58:05,114 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 764 transitions. [2021-08-21 17:58:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:58:05,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:05,114 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:05,136 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 17:58:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 17:58:05,329 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash -804838600, now seen corresponding path program 5 times [2021-08-21 17:58:05,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:05,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074730538] [2021-08-21 17:58:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:05,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:05,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:05,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074730538] [2021-08-21 17:58:05,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074730538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:05,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901186854] [2021-08-21 17:58:05,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:58:05,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:05,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:05,362 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 17:58:05,378 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 17:58:05,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:58:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:05,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:58:05,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:05,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901186854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:05,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:05,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-21 17:58:05,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047904982] [2021-08-21 17:58:05,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:58:05,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:05,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:58:05,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:58:05,985 INFO L87 Difference]: Start difference. First operand 281 states and 764 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 17:58:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:06,027 INFO L93 Difference]: Finished difference Result 440 states and 1137 transitions. [2021-08-21 17:58:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:58:06,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:58:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:06,029 INFO L225 Difference]: With dead ends: 440 [2021-08-21 17:58:06,029 INFO L226 Difference]: Without dead ends: 424 [2021-08-21 17:58:06,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:58:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-08-21 17:58:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 381. [2021-08-21 17:58:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.6842105263157894) internal successors, (1020), 380 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:06,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1020 transitions. [2021-08-21 17:58:06,036 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1020 transitions. Word has length 31 [2021-08-21 17:58:06,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:06,036 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 1020 transitions. [2021-08-21 17:58:06,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 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 17:58:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1020 transitions. [2021-08-21 17:58:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:58:06,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:06,037 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:06,055 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 17:58:06,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 17:58:06,249 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash 192167800, now seen corresponding path program 6 times [2021-08-21 17:58:06,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:06,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791548648] [2021-08-21 17:58:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:06,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:06,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791548648] [2021-08-21 17:58:06,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791548648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:06,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088452741] [2021-08-21 17:58:06,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:06,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:06,293 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 17:58:06,295 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 17:58:06,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:58:06,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 17:58:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 17:58:06,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088452741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:06,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:06,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 17:58:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2974132] [2021-08-21 17:58:06,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:58:06,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:06,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:58:06,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:58:06,923 INFO L87 Difference]: Start difference. First operand 381 states and 1020 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:06,988 INFO L93 Difference]: Finished difference Result 560 states and 1451 transitions. [2021-08-21 17:58:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:58:06,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:58:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:06,990 INFO L225 Difference]: With dead ends: 560 [2021-08-21 17:58:06,990 INFO L226 Difference]: Without dead ends: 536 [2021-08-21 17:58:06,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:58:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-08-21 17:58:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 413. [2021-08-21 17:58:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.662621359223301) internal successors, (1097), 412 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1097 transitions. [2021-08-21 17:58:06,999 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1097 transitions. Word has length 31 [2021-08-21 17:58:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:06,999 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1097 transitions. [2021-08-21 17:58:06,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1097 transitions. [2021-08-21 17:58:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:58:07,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:07,000 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:07,021 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 17:58:07,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 17:58:07,219 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1915026712, now seen corresponding path program 7 times [2021-08-21 17:58:07,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:07,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820894232] [2021-08-21 17:58:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:07,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:07,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820894232] [2021-08-21 17:58:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820894232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:07,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415497101] [2021-08-21 17:58:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:07,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:07,273 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 17:58:07,300 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 17:58:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:58:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:07,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415497101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:07,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:07,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2021-08-21 17:58:07,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540052504] [2021-08-21 17:58:07,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 17:58:07,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 17:58:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:58:07,932 INFO L87 Difference]: Start difference. First operand 413 states and 1097 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:07,973 INFO L93 Difference]: Finished difference Result 649 states and 1657 transitions. [2021-08-21 17:58:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:58:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 17:58:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:07,975 INFO L225 Difference]: With dead ends: 649 [2021-08-21 17:58:07,975 INFO L226 Difference]: Without dead ends: 640 [2021-08-21 17:58:07,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:58:07,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-21 17:58:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 585. [2021-08-21 17:58:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.6763698630136985) internal successors, (1563), 584 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1563 transitions. [2021-08-21 17:58:07,997 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1563 transitions. Word has length 31 [2021-08-21 17:58:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:07,998 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 1563 transitions. [2021-08-21 17:58:07,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1563 transitions. [2021-08-21 17:58:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:07,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:07,999 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:08,019 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 17:58:08,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:08,217 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:08,217 INFO L82 PathProgramCache]: Analyzing trace with hash -966371689, now seen corresponding path program 8 times [2021-08-21 17:58:08,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:08,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777863462] [2021-08-21 17:58:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:08,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:08,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:08,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777863462] [2021-08-21 17:58:08,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777863462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:08,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777132103] [2021-08-21 17:58:08,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:08,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:08,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:08,449 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 17:58:08,455 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 17:58:09,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:09,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:09,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:09,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 17:58:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:10,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777132103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:10,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:10,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:58:10,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570334380] [2021-08-21 17:58:10,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:58:10,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:58:10,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:58:10,190 INFO L87 Difference]: Start difference. First operand 585 states and 1563 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:12,095 INFO L93 Difference]: Finished difference Result 758 states and 2009 transitions. [2021-08-21 17:58:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:58:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:12,098 INFO L225 Difference]: With dead ends: 758 [2021-08-21 17:58:12,098 INFO L226 Difference]: Without dead ends: 745 [2021-08-21 17:58:12,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1860.1ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:58:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-08-21 17:58:12,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 609. [2021-08-21 17:58:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 2.6891447368421053) internal successors, (1635), 608 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 1635 transitions. [2021-08-21 17:58:12,110 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 1635 transitions. Word has length 33 [2021-08-21 17:58:12,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:12,110 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 1635 transitions. [2021-08-21 17:58:12,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:12,110 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 1635 transitions. [2021-08-21 17:58:12,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:12,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:12,111 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:12,130 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 17:58:12,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:12,325 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:12,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1435085943, now seen corresponding path program 1 times [2021-08-21 17:58:12,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:12,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954773395] [2021-08-21 17:58:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:12,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:12,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:12,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954773395] [2021-08-21 17:58:12,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954773395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:12,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564597171] [2021-08-21 17:58:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:12,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:12,561 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 17:58:12,561 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 17:58:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:13,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:13,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 17:58:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:13,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564597171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:13,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:13,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:58:13,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097068212] [2021-08-21 17:58:13,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:58:13,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:58:13,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:58:13,773 INFO L87 Difference]: Start difference. First operand 609 states and 1635 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:14,936 INFO L93 Difference]: Finished difference Result 869 states and 2259 transitions. [2021-08-21 17:58:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:58:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:14,939 INFO L225 Difference]: With dead ends: 869 [2021-08-21 17:58:14,939 INFO L226 Difference]: Without dead ends: 843 [2021-08-21 17:58:14,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:58:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-08-21 17:58:14,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 624. [2021-08-21 17:58:14,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 2.6998394863563404) internal successors, (1682), 623 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1682 transitions. [2021-08-21 17:58:14,951 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1682 transitions. Word has length 33 [2021-08-21 17:58:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:14,951 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 1682 transitions. [2021-08-21 17:58:14,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1682 transitions. [2021-08-21 17:58:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:14,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:14,952 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:14,993 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 17:58:15,165 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,SelfDestructingSolverStorable20 [2021-08-21 17:58:15,165 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1224882047, now seen corresponding path program 2 times [2021-08-21 17:58:15,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:15,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361833387] [2021-08-21 17:58:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:15,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:15,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:15,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361833387] [2021-08-21 17:58:15,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361833387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:15,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313280938] [2021-08-21 17:58:15,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:15,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:15,425 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 17:58:15,432 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 17:58:16,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:16,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:16,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:16,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:16,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:16,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-21 17:58:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:16,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313280938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:16,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:16,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:58:16,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676603586] [2021-08-21 17:58:16,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:58:16,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:16,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:58:16,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:16,959 INFO L87 Difference]: Start difference. First operand 624 states and 1682 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:18,751 INFO L93 Difference]: Finished difference Result 754 states and 2017 transitions. [2021-08-21 17:58:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:58:18,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:18,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:18,756 INFO L225 Difference]: With dead ends: 754 [2021-08-21 17:58:18,756 INFO L226 Difference]: Without dead ends: 741 [2021-08-21 17:58:18,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1693.9ms TimeCoverageRelationStatistics Valid=385, Invalid=2267, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:58:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-21 17:58:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 627. [2021-08-21 17:58:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.696485623003195) internal successors, (1688), 626 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1688 transitions. [2021-08-21 17:58:18,766 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1688 transitions. Word has length 33 [2021-08-21 17:58:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:18,766 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1688 transitions. [2021-08-21 17:58:18,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:18,766 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1688 transitions. [2021-08-21 17:58:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:18,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:18,768 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:18,790 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 17:58:18,973 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,SelfDestructingSolverStorable21 [2021-08-21 17:58:18,973 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1763142311, now seen corresponding path program 3 times [2021-08-21 17:58:18,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:18,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757478993] [2021-08-21 17:58:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:18,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:19,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:19,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757478993] [2021-08-21 17:58:19,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757478993] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:19,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497396148] [2021-08-21 17:58:19,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:19,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:19,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:19,191 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 17:58:19,191 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 17:58:19,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:58:19,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:19,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 17:58:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:20,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:20,305 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 17:58:20,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 51 [2021-08-21 17:58:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:20,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497396148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:20,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:20,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:58:20,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583508879] [2021-08-21 17:58:20,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:58:20,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:58:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:20,701 INFO L87 Difference]: Start difference. First operand 627 states and 1688 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:21,824 INFO L93 Difference]: Finished difference Result 701 states and 1866 transitions. [2021-08-21 17:58:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:58:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:21,827 INFO L225 Difference]: With dead ends: 701 [2021-08-21 17:58:21,827 INFO L226 Difference]: Without dead ends: 688 [2021-08-21 17:58:21,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=240, Invalid=1830, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:58:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-08-21 17:58:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 627. [2021-08-21 17:58:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.696485623003195) internal successors, (1688), 626 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1688 transitions. [2021-08-21 17:58:21,837 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1688 transitions. Word has length 33 [2021-08-21 17:58:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:21,837 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 1688 transitions. [2021-08-21 17:58:21,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1688 transitions. [2021-08-21 17:58:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:21,838 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:21,838 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:21,857 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 17:58:22,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:22,053 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1867705689, now seen corresponding path program 4 times [2021-08-21 17:58:22,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:22,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716430624] [2021-08-21 17:58:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:22,054 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:22,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:22,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716430624] [2021-08-21 17:58:22,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716430624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:22,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485463620] [2021-08-21 17:58:22,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:22,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:22,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:22,274 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 17:58:22,275 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 17:58:23,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:23,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:23,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:23,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:23,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:23,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-21 17:58:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:23,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485463620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:23,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:23,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:58:23,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273118609] [2021-08-21 17:58:23,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:58:23,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:58:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:58:23,621 INFO L87 Difference]: Start difference. First operand 627 states and 1688 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:24,463 INFO L93 Difference]: Finished difference Result 793 states and 2090 transitions. [2021-08-21 17:58:24,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:58:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:24,466 INFO L225 Difference]: With dead ends: 793 [2021-08-21 17:58:24,466 INFO L226 Difference]: Without dead ends: 780 [2021-08-21 17:58:24,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 788.6ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:58:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-08-21 17:58:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 633. [2021-08-21 17:58:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.6914556962025316) internal successors, (1701), 632 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1701 transitions. [2021-08-21 17:58:24,476 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1701 transitions. Word has length 33 [2021-08-21 17:58:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:24,476 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1701 transitions. [2021-08-21 17:58:24,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1701 transitions. [2021-08-21 17:58:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:24,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:24,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:24,496 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 17:58:24,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:24,681 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:24,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1969460161, now seen corresponding path program 5 times [2021-08-21 17:58:24,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:24,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796523851] [2021-08-21 17:58:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:24,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:24,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:24,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796523851] [2021-08-21 17:58:24,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796523851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:24,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517448820] [2021-08-21 17:58:24,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:58:24,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:24,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:24,909 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 17:58:24,910 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 17:58:25,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:58:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:25,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:26,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-21 17:58:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:26,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517448820] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:26,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:26,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:58:26,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451582433] [2021-08-21 17:58:26,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:58:26,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:26,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:58:26,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:58:26,266 INFO L87 Difference]: Start difference. First operand 633 states and 1701 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:27,087 INFO L93 Difference]: Finished difference Result 799 states and 2094 transitions. [2021-08-21 17:58:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:58:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:27,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:27,090 INFO L225 Difference]: With dead ends: 799 [2021-08-21 17:58:27,090 INFO L226 Difference]: Without dead ends: 786 [2021-08-21 17:58:27,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 819.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:58:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-08-21 17:58:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 630. [2021-08-21 17:58:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.694753577106518) internal successors, (1695), 629 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1695 transitions. [2021-08-21 17:58:27,101 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1695 transitions. Word has length 33 [2021-08-21 17:58:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:27,101 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1695 transitions. [2021-08-21 17:58:27,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:27,101 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1695 transitions. [2021-08-21 17:58:27,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:27,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:27,102 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:27,123 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 17:58:27,319 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,SelfDestructingSolverStorable24 [2021-08-21 17:58:27,319 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:27,320 INFO L82 PathProgramCache]: Analyzing trace with hash -226869577, now seen corresponding path program 6 times [2021-08-21 17:58:27,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:27,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447507881] [2021-08-21 17:58:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:27,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:27,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:27,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447507881] [2021-08-21 17:58:27,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447507881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:27,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516093344] [2021-08-21 17:58:27,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:58:27,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:27,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:27,532 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 17:58:27,534 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 17:58:28,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:58:28,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:28,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:28,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:28,796 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 17:58:28,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 53 [2021-08-21 17:58:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:29,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516093344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:29,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:29,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:58:29,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051736199] [2021-08-21 17:58:29,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:58:29,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:58:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:58:29,121 INFO L87 Difference]: Start difference. First operand 630 states and 1695 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:30,281 INFO L93 Difference]: Finished difference Result 720 states and 1906 transitions. [2021-08-21 17:58:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:58:30,281 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:30,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:30,284 INFO L225 Difference]: With dead ends: 720 [2021-08-21 17:58:30,284 INFO L226 Difference]: Without dead ends: 707 [2021-08-21 17:58:30,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1038.8ms TimeCoverageRelationStatistics Valid=247, Invalid=2105, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:58:30,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-21 17:58:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 633. [2021-08-21 17:58:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.7009493670886076) internal successors, (1707), 632 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:30,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1707 transitions. [2021-08-21 17:58:30,297 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1707 transitions. Word has length 33 [2021-08-21 17:58:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:30,297 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1707 transitions. [2021-08-21 17:58:30,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1707 transitions. [2021-08-21 17:58:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:30,298 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:30,298 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:30,318 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 17:58:30,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 17:58:30,518 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:30,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1456534953, now seen corresponding path program 4 times [2021-08-21 17:58:30,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:30,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140435872] [2021-08-21 17:58:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:30,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:30,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:30,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:30,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140435872] [2021-08-21 17:58:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140435872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:30,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178542604] [2021-08-21 17:58:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:30,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:30,750 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 17:58:30,751 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 17:58:31,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:31,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:31,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:31,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 17:58:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:32,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178542604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:32,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:32,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:58:32,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216578464] [2021-08-21 17:58:32,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:58:32,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:32,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:58:32,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:58:32,251 INFO L87 Difference]: Start difference. First operand 633 states and 1707 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:33,312 INFO L93 Difference]: Finished difference Result 876 states and 2290 transitions. [2021-08-21 17:58:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:58:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:33,315 INFO L225 Difference]: With dead ends: 876 [2021-08-21 17:58:33,316 INFO L226 Difference]: Without dead ends: 850 [2021-08-21 17:58:33,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 945.6ms TimeCoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:58:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-08-21 17:58:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 640. [2021-08-21 17:58:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 2.699530516431925) internal successors, (1725), 639 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:33,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 1725 transitions. [2021-08-21 17:58:33,325 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 1725 transitions. Word has length 33 [2021-08-21 17:58:33,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:33,326 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 1725 transitions. [2021-08-21 17:58:33,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 1725 transitions. [2021-08-21 17:58:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:33,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:33,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:33,348 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 17:58:33,549 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,SelfDestructingSolverStorable26 [2021-08-21 17:58:33,549 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash 30634711, now seen corresponding path program 9 times [2021-08-21 17:58:33,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:33,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724567022] [2021-08-21 17:58:33,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:33,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:33,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:33,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724567022] [2021-08-21 17:58:33,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724567022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:33,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578804840] [2021-08-21 17:58:33,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:33,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:33,841 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 17:58:33,842 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 17:58:34,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:58:34,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:35,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:35,188 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 17:58:35,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 51 [2021-08-21 17:58:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:35,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578804840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:35,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:35,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:58:35,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625056272] [2021-08-21 17:58:35,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:58:35,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:58:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:58:35,529 INFO L87 Difference]: Start difference. First operand 640 states and 1725 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:37,153 INFO L93 Difference]: Finished difference Result 794 states and 2134 transitions. [2021-08-21 17:58:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:58:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:37,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:37,156 INFO L225 Difference]: With dead ends: 794 [2021-08-21 17:58:37,156 INFO L226 Difference]: Without dead ends: 768 [2021-08-21 17:58:37,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1461.8ms TimeCoverageRelationStatistics Valid=442, Invalid=2864, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:58:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-08-21 17:58:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 657. [2021-08-21 17:58:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 2.721036585365854) internal successors, (1785), 656 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1785 transitions. [2021-08-21 17:58:37,166 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1785 transitions. Word has length 33 [2021-08-21 17:58:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:37,166 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1785 transitions. [2021-08-21 17:58:37,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1785 transitions. [2021-08-21 17:58:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:37,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:37,167 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:37,187 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 17:58:37,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 17:58:37,381 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -561785225, now seen corresponding path program 1 times [2021-08-21 17:58:37,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:37,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761104112] [2021-08-21 17:58:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:37,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:37,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:37,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761104112] [2021-08-21 17:58:37,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761104112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:37,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783590381] [2021-08-21 17:58:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:37,649 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:37,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:37,653 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 17:58:37,654 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 17:58:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:38,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:39,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:39,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 17:58:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:39,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783590381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:39,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:39,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:58:39,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169612143] [2021-08-21 17:58:39,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:58:39,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:39,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:58:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:58:39,229 INFO L87 Difference]: Start difference. First operand 657 states and 1785 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:41,064 INFO L93 Difference]: Finished difference Result 977 states and 2614 transitions. [2021-08-21 17:58:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 17:58:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:41,067 INFO L225 Difference]: With dead ends: 977 [2021-08-21 17:58:41,067 INFO L226 Difference]: Without dead ends: 938 [2021-08-21 17:58:41,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1511.1ms TimeCoverageRelationStatistics Valid=650, Invalid=3510, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 17:58:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-08-21 17:58:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 700. [2021-08-21 17:58:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.7510729613733904) internal successors, (1923), 699 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1923 transitions. [2021-08-21 17:58:41,078 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1923 transitions. Word has length 33 [2021-08-21 17:58:41,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:41,078 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1923 transitions. [2021-08-21 17:58:41,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1923 transitions. [2021-08-21 17:58:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:41,080 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:41,080 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:41,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 17:58:41,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 17:58:41,293 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1730567417, now seen corresponding path program 10 times [2021-08-21 17:58:41,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:41,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794398601] [2021-08-21 17:58:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:41,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:41,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:41,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:41,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794398601] [2021-08-21 17:58:41,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794398601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:41,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394100922] [2021-08-21 17:58:41,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:58:41,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:41,509 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 17:58:41,510 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 17:58:42,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:58:42,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:42,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:42,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:42,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 17:58:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:43,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394100922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:43,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:43,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:58:43,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690059345] [2021-08-21 17:58:43,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:58:43,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:43,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:58:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:58:43,089 INFO L87 Difference]: Start difference. First operand 700 states and 1923 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:44,154 INFO L93 Difference]: Finished difference Result 916 states and 2451 transitions. [2021-08-21 17:58:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:58:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:44,158 INFO L225 Difference]: With dead ends: 916 [2021-08-21 17:58:44,158 INFO L226 Difference]: Without dead ends: 886 [2021-08-21 17:58:44,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 980.3ms TimeCoverageRelationStatistics Valid=448, Invalid=2308, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:58:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-08-21 17:58:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 708. [2021-08-21 17:58:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 2.7567185289957568) internal successors, (1949), 707 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1949 transitions. [2021-08-21 17:58:44,168 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1949 transitions. Word has length 33 [2021-08-21 17:58:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 1949 transitions. [2021-08-21 17:58:44,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1949 transitions. [2021-08-21 17:58:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:44,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:44,169 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:44,188 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 17:58:44,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:44,381 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1587798199, now seen corresponding path program 7 times [2021-08-21 17:58:44,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:44,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914576558] [2021-08-21 17:58:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:44,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:44,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:44,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914576558] [2021-08-21 17:58:44,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914576558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:44,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026883414] [2021-08-21 17:58:44,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:58:44,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:44,609 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 17:58:44,610 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 17:58:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:46,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:46,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 17:58:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:46,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026883414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:46,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:46,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:58:46,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068748862] [2021-08-21 17:58:46,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:58:46,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:46,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:58:46,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:58:46,240 INFO L87 Difference]: Start difference. First operand 708 states and 1949 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:47,267 INFO L93 Difference]: Finished difference Result 981 states and 2605 transitions. [2021-08-21 17:58:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:58:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:47,271 INFO L225 Difference]: With dead ends: 981 [2021-08-21 17:58:47,271 INFO L226 Difference]: Without dead ends: 944 [2021-08-21 17:58:47,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:58:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-08-21 17:58:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 710. [2021-08-21 17:58:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 2.760225669957687) internal successors, (1957), 709 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1957 transitions. [2021-08-21 17:58:47,282 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1957 transitions. Word has length 33 [2021-08-21 17:58:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:47,282 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 1957 transitions. [2021-08-21 17:58:47,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1957 transitions. [2021-08-21 17:58:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:47,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:47,283 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:47,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 17:58:47,491 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,SelfDestructingSolverStorable30 [2021-08-21 17:58:47,491 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:47,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash -56579111, now seen corresponding path program 2 times [2021-08-21 17:58:47,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:47,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710068750] [2021-08-21 17:58:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:47,492 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:47,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:47,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710068750] [2021-08-21 17:58:47,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710068750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:47,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860897759] [2021-08-21 17:58:47,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:47,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:47,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:47,721 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 17:58:47,721 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 17:58:48,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:58:48,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:48,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:49,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:49,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 17:58:49,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:49,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860897759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:49,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:49,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:58:49,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576761746] [2021-08-21 17:58:49,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:58:49,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:58:49,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:58:49,771 INFO L87 Difference]: Start difference. First operand 710 states and 1957 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:51,647 INFO L93 Difference]: Finished difference Result 910 states and 2468 transitions. [2021-08-21 17:58:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:58:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:51,651 INFO L225 Difference]: With dead ends: 910 [2021-08-21 17:58:51,651 INFO L226 Difference]: Without dead ends: 895 [2021-08-21 17:58:51,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1678.7ms TimeCoverageRelationStatistics Valid=394, Invalid=2362, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:58:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-08-21 17:58:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 713. [2021-08-21 17:58:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 2.764044943820225) internal successors, (1968), 712 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 1968 transitions. [2021-08-21 17:58:51,661 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 1968 transitions. Word has length 33 [2021-08-21 17:58:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 1968 transitions. [2021-08-21 17:58:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 1968 transitions. [2021-08-21 17:58:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:51,662 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:51,662 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:51,681 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 17:58:51,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:51,869 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1101432439, now seen corresponding path program 3 times [2021-08-21 17:58:51,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:51,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511358515] [2021-08-21 17:58:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:51,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:52,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:52,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511358515] [2021-08-21 17:58:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511358515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:52,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346915659] [2021-08-21 17:58:52,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:58:52,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:52,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:52,072 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 17:58:52,072 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 17:58:53,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:58:53,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:58:53,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:53,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:53,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:58:53,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-21 17:58:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:54,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346915659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:54,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:54,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 17:58:54,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905740992] [2021-08-21 17:58:54,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:58:54,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:58:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:58:54,162 INFO L87 Difference]: Start difference. First operand 713 states and 1968 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:55,747 INFO L93 Difference]: Finished difference Result 919 states and 2461 transitions. [2021-08-21 17:58:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:58:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:55,751 INFO L225 Difference]: With dead ends: 919 [2021-08-21 17:58:55,751 INFO L226 Difference]: Without dead ends: 903 [2021-08-21 17:58:55,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1354.3ms TimeCoverageRelationStatistics Valid=368, Invalid=2388, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:58:55,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-08-21 17:58:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 717. [2021-08-21 17:58:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 2.7695530726256985) internal successors, (1983), 716 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1983 transitions. [2021-08-21 17:58:55,767 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1983 transitions. Word has length 33 [2021-08-21 17:58:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:55,768 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 1983 transitions. [2021-08-21 17:58:55,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1983 transitions. [2021-08-21 17:58:55,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:55,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:55,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:55,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 17:58:55,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:55,969 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -792077225, now seen corresponding path program 1 times [2021-08-21 17:58:55,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:55,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78521672] [2021-08-21 17:58:55,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:55,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:56,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:56,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78521672] [2021-08-21 17:58:56,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78521672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:56,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955647783] [2021-08-21 17:58:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:56,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:56,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:56,173 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 17:58:56,208 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 17:58:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:57,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:58:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:58:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:58:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 17:58:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:57,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955647783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:57,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:58:57,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:58:57,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527258398] [2021-08-21 17:58:57,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:58:57,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:58:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:58:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:58:57,990 INFO L87 Difference]: Start difference. First operand 717 states and 1983 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:58,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:58:58,958 INFO L93 Difference]: Finished difference Result 974 states and 2580 transitions. [2021-08-21 17:58:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:58:58,958 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:58:58,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:58:58,961 INFO L225 Difference]: With dead ends: 974 [2021-08-21 17:58:58,961 INFO L226 Difference]: Without dead ends: 937 [2021-08-21 17:58:58,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 870.4ms TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 17:58:58,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-08-21 17:58:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 721. [2021-08-21 17:58:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.7666666666666666) internal successors, (1992), 720 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1992 transitions. [2021-08-21 17:58:58,971 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1992 transitions. Word has length 33 [2021-08-21 17:58:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:58:58,971 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1992 transitions. [2021-08-21 17:58:58,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:58:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1992 transitions. [2021-08-21 17:58:58,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:58:58,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:58:58,972 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:58:58,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 17:58:59,176 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,SelfDestructingSolverStorable33 [2021-08-21 17:58:59,177 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:58:59,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:58:59,177 INFO L82 PathProgramCache]: Analyzing trace with hash -561443177, now seen corresponding path program 2 times [2021-08-21 17:58:59,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:58:59,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723665631] [2021-08-21 17:58:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:58:59,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:58:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:58:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:58:59,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:58:59,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723665631] [2021-08-21 17:58:59,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723665631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:58:59,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796676638] [2021-08-21 17:58:59,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:58:59,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:58:59,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:58:59,440 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 17:58:59,441 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 17:59:00,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:00,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:01,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:01,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 17:59:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:01,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796676638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:01,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:01,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:01,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840695962] [2021-08-21 17:59:01,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:01,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:01,514 INFO L87 Difference]: Start difference. First operand 721 states and 1992 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:03,717 INFO L93 Difference]: Finished difference Result 1000 states and 2737 transitions. [2021-08-21 17:59:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:59:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:03,721 INFO L225 Difference]: With dead ends: 1000 [2021-08-21 17:59:03,721 INFO L226 Difference]: Without dead ends: 974 [2021-08-21 17:59:03,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1950.9ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:59:03,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-08-21 17:59:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 731. [2021-08-21 17:59:03,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 2.7739726027397262) internal successors, (2025), 730 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2025 transitions. [2021-08-21 17:59:03,732 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2025 transitions. Word has length 33 [2021-08-21 17:59:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:03,732 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2025 transitions. [2021-08-21 17:59:03,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2025 transitions. [2021-08-21 17:59:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:03,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:03,733 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:03,753 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 17:59:03,933 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,SelfDestructingSolverStorable34 [2021-08-21 17:59:03,934 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:03,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:03,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1837885127, now seen corresponding path program 3 times [2021-08-21 17:59:03,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:03,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496215315] [2021-08-21 17:59:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:03,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:04,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:04,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496215315] [2021-08-21 17:59:04,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496215315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:04,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458007441] [2021-08-21 17:59:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:04,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:04,157 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 17:59:04,158 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 17:59:05,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:59:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:05,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:05,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:05,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 17:59:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:06,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458007441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:06,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:06,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:06,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202986923] [2021-08-21 17:59:06,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:06,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:06,328 INFO L87 Difference]: Start difference. First operand 731 states and 2025 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:07,917 INFO L93 Difference]: Finished difference Result 909 states and 2469 transitions. [2021-08-21 17:59:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:59:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:07,920 INFO L225 Difference]: With dead ends: 909 [2021-08-21 17:59:07,920 INFO L226 Difference]: Without dead ends: 894 [2021-08-21 17:59:07,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1450.9ms TimeCoverageRelationStatistics Valid=372, Invalid=2078, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:59:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-08-21 17:59:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 731. [2021-08-21 17:59:07,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 2.7739726027397262) internal successors, (2025), 730 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2025 transitions. [2021-08-21 17:59:07,930 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2025 transitions. Word has length 33 [2021-08-21 17:59:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:07,930 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2025 transitions. [2021-08-21 17:59:07,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2025 transitions. [2021-08-21 17:59:07,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:07,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:07,931 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:07,951 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 17:59:08,131 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,SelfDestructingSolverStorable35 [2021-08-21 17:59:08,132 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:08,132 INFO L82 PathProgramCache]: Analyzing trace with hash -220161255, now seen corresponding path program 8 times [2021-08-21 17:59:08,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:08,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435744889] [2021-08-21 17:59:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:08,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:08,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:08,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435744889] [2021-08-21 17:59:08,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435744889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:08,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421475827] [2021-08-21 17:59:08,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:08,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:08,370 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 17:59:08,371 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 17:59:09,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:09,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:10,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:10,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 17:59:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:10,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421475827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:10,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:10,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:10,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52153986] [2021-08-21 17:59:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:10,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:10,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:10,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:10,625 INFO L87 Difference]: Start difference. First operand 731 states and 2025 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:12,700 INFO L93 Difference]: Finished difference Result 924 states and 2521 transitions. [2021-08-21 17:59:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 17:59:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:12,702 INFO L225 Difference]: With dead ends: 924 [2021-08-21 17:59:12,702 INFO L226 Difference]: Without dead ends: 909 [2021-08-21 17:59:12,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 1894.4ms TimeCoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:59:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-08-21 17:59:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 731. [2021-08-21 17:59:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 2.7739726027397262) internal successors, (2025), 730 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2025 transitions. [2021-08-21 17:59:12,713 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2025 transitions. Word has length 33 [2021-08-21 17:59:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:12,713 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 2025 transitions. [2021-08-21 17:59:12,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2025 transitions. [2021-08-21 17:59:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:12,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:12,714 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:12,734 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 17:59:12,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:12,917 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:12,917 INFO L82 PathProgramCache]: Analyzing trace with hash 102104635, now seen corresponding path program 9 times [2021-08-21 17:59:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:12,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682637368] [2021-08-21 17:59:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:12,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:13,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:13,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682637368] [2021-08-21 17:59:13,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682637368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:13,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993661471] [2021-08-21 17:59:13,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:13,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:13,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:13,214 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 17:59:13,268 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 17:59:14,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:59:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:15,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:15,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-21 17:59:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:15,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993661471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:15,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:15,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:15,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193646598] [2021-08-21 17:59:15,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:15,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:15,512 INFO L87 Difference]: Start difference. First operand 731 states and 2025 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:17,771 INFO L93 Difference]: Finished difference Result 1014 states and 2781 transitions. [2021-08-21 17:59:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 17:59:17,772 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:17,774 INFO L225 Difference]: With dead ends: 1014 [2021-08-21 17:59:17,774 INFO L226 Difference]: Without dead ends: 988 [2021-08-21 17:59:17,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2025.0ms TimeCoverageRelationStatistics Valid=509, Invalid=3273, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:59:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-08-21 17:59:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 734. [2021-08-21 17:59:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.77762619372442) internal successors, (2036), 733 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2036 transitions. [2021-08-21 17:59:17,785 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2036 transitions. Word has length 33 [2021-08-21 17:59:17,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:17,785 INFO L470 AbstractCegarLoop]: Abstraction has 734 states and 2036 transitions. [2021-08-21 17:59:17,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2036 transitions. [2021-08-21 17:59:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:17,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:17,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:17,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 17:59:18,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 17:59:18,001 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:18,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1016641893, now seen corresponding path program 11 times [2021-08-21 17:59:18,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:18,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473733304] [2021-08-21 17:59:18,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:18,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:18,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:18,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473733304] [2021-08-21 17:59:18,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473733304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:18,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267336411] [2021-08-21 17:59:18,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:18,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:18,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:18,267 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 17:59:18,268 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 17:59:19,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:59:19,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:19,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:20,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 17:59:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:20,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267336411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:20,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:20,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:59:20,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547808792] [2021-08-21 17:59:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:59:20,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:59:20,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:59:20,349 INFO L87 Difference]: Start difference. First operand 734 states and 2036 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:21,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:21,590 INFO L93 Difference]: Finished difference Result 1070 states and 2823 transitions. [2021-08-21 17:59:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 17:59:21,590 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:21,592 INFO L225 Difference]: With dead ends: 1070 [2021-08-21 17:59:21,592 INFO L226 Difference]: Without dead ends: 1031 [2021-08-21 17:59:21,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1133.8ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:59:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-08-21 17:59:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 760. [2021-08-21 17:59:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.7812911725955205) internal successors, (2111), 759 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2111 transitions. [2021-08-21 17:59:21,603 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2111 transitions. Word has length 33 [2021-08-21 17:59:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2111 transitions. [2021-08-21 17:59:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2111 transitions. [2021-08-21 17:59:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:21,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:21,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:21,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-21 17:59:21,805 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,SelfDestructingSolverStorable38 [2021-08-21 17:59:21,805 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:21,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1159411111, now seen corresponding path program 10 times [2021-08-21 17:59:21,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:21,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721688161] [2021-08-21 17:59:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:21,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:22,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:22,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721688161] [2021-08-21 17:59:22,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721688161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:22,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769766598] [2021-08-21 17:59:22,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:22,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:22,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:22,033 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 17:59:22,060 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 17:59:23,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:24,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 17:59:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:24,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769766598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:24,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:24,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:59:24,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825318603] [2021-08-21 17:59:24,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:59:24,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:59:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:59:24,167 INFO L87 Difference]: Start difference. First operand 760 states and 2111 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:25,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:25,365 INFO L93 Difference]: Finished difference Result 1071 states and 2858 transitions. [2021-08-21 17:59:25,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:59:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:25,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:25,368 INFO L225 Difference]: With dead ends: 1071 [2021-08-21 17:59:25,368 INFO L226 Difference]: Without dead ends: 1045 [2021-08-21 17:59:25,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1011.1ms TimeCoverageRelationStatistics Valid=326, Invalid=2326, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:59:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-08-21 17:59:25,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 765. [2021-08-21 17:59:25,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 765 states, 764 states have (on average 2.7892670157068062) internal successors, (2131), 764 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 2131 transitions. [2021-08-21 17:59:25,379 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 2131 transitions. Word has length 33 [2021-08-21 17:59:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:25,379 INFO L470 AbstractCegarLoop]: Abstraction has 765 states and 2131 transitions. [2021-08-21 17:59:25,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 2131 transitions. [2021-08-21 17:59:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:25,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:25,380 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:25,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:25,590 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,SelfDestructingSolverStorable39 [2021-08-21 17:59:25,590 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:25,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:25,590 INFO L82 PathProgramCache]: Analyzing trace with hash 115191995, now seen corresponding path program 4 times [2021-08-21 17:59:25,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:25,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088209921] [2021-08-21 17:59:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:25,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:25,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:25,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088209921] [2021-08-21 17:59:25,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088209921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:25,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357972877] [2021-08-21 17:59:25,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:25,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:25,814 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 17:59:25,815 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 17:59:27,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 17:59:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:27,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357972877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:27,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:27,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:59:27,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738355912] [2021-08-21 17:59:27,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:59:27,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:59:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:59:27,985 INFO L87 Difference]: Start difference. First operand 765 states and 2131 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:29,208 INFO L93 Difference]: Finished difference Result 1072 states and 2855 transitions. [2021-08-21 17:59:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:59:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:29,211 INFO L225 Difference]: With dead ends: 1072 [2021-08-21 17:59:29,211 INFO L226 Difference]: Without dead ends: 1033 [2021-08-21 17:59:29,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 17:59:29,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-08-21 17:59:29,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 805. [2021-08-21 17:59:29,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 2.7997512437810945) internal successors, (2251), 804 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2251 transitions. [2021-08-21 17:59:29,222 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2251 transitions. Word has length 33 [2021-08-21 17:59:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:29,222 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2251 transitions. [2021-08-21 17:59:29,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:29,222 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2251 transitions. [2021-08-21 17:59:29,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:29,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:29,232 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:29,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 17:59:29,444 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,SelfDestructingSolverStorable40 [2021-08-21 17:59:29,445 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash -620306119, now seen corresponding path program 4 times [2021-08-21 17:59:29,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:29,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017437504] [2021-08-21 17:59:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:29,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:29,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:29,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017437504] [2021-08-21 17:59:29,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017437504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:29,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160100549] [2021-08-21 17:59:29,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:29,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:29,651 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 17:59:29,653 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 17:59:31,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:59:31,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:31,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:31,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:31,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 17:59:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:31,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160100549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:31,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:31,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:59:31,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806651315] [2021-08-21 17:59:31,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:59:31,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:59:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:59:31,929 INFO L87 Difference]: Start difference. First operand 805 states and 2251 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:33,062 INFO L93 Difference]: Finished difference Result 1073 states and 2890 transitions. [2021-08-21 17:59:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:59:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:33,065 INFO L225 Difference]: With dead ends: 1073 [2021-08-21 17:59:33,065 INFO L226 Difference]: Without dead ends: 1047 [2021-08-21 17:59:33,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 970.3ms TimeCoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 17:59:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-08-21 17:59:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 816. [2021-08-21 17:59:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.8134969325153376) internal successors, (2293), 815 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2293 transitions. [2021-08-21 17:59:33,076 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2293 transitions. Word has length 33 [2021-08-21 17:59:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:33,076 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2293 transitions. [2021-08-21 17:59:33,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2293 transitions. [2021-08-21 17:59:33,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:33,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:33,078 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:33,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 17:59:33,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:33,278 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:33,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1725773431, now seen corresponding path program 5 times [2021-08-21 17:59:33,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:33,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188210775] [2021-08-21 17:59:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:33,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:33,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:33,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188210775] [2021-08-21 17:59:33,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188210775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:33,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272175839] [2021-08-21 17:59:33,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:33,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:33,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:33,493 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 17:59:33,494 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 17:59:35,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:59:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:35,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:35,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 17:59:35,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:35,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272175839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:35,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:35,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 17:59:35,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638300793] [2021-08-21 17:59:35,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:59:35,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:35,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:59:35,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:59:35,772 INFO L87 Difference]: Start difference. First operand 816 states and 2293 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:36,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:36,808 INFO L93 Difference]: Finished difference Result 1088 states and 2938 transitions. [2021-08-21 17:59:36,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:59:36,809 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:36,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:36,811 INFO L225 Difference]: With dead ends: 1088 [2021-08-21 17:59:36,811 INFO L226 Difference]: Without dead ends: 1062 [2021-08-21 17:59:36,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:59:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-08-21 17:59:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 842. [2021-08-21 17:59:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.8287752675386444) internal successors, (2379), 841 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2379 transitions. [2021-08-21 17:59:36,823 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2379 transitions. Word has length 33 [2021-08-21 17:59:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:36,823 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2379 transitions. [2021-08-21 17:59:36,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2379 transitions. [2021-08-21 17:59:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:36,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:36,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:36,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:37,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:37,041 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:37,041 INFO L82 PathProgramCache]: Analyzing trace with hash -167736233, now seen corresponding path program 5 times [2021-08-21 17:59:37,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:37,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266197524] [2021-08-21 17:59:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:37,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:37,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:37,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266197524] [2021-08-21 17:59:37,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266197524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:37,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751572844] [2021-08-21 17:59:37,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:59:37,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:37,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:37,242 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 17:59:37,242 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 17:59:39,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:39,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:39,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 17:59:39,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:39,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 17:59:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:39,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751572844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:39,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:59:39,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073789541] [2021-08-21 17:59:39,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:59:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:59:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:59:39,588 INFO L87 Difference]: Start difference. First operand 842 states and 2379 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:40,616 INFO L93 Difference]: Finished difference Result 1074 states and 2921 transitions. [2021-08-21 17:59:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:59:40,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:40,619 INFO L225 Difference]: With dead ends: 1074 [2021-08-21 17:59:40,619 INFO L226 Difference]: Without dead ends: 1048 [2021-08-21 17:59:40,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 890.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:59:40,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-08-21 17:59:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 840. [2021-08-21 17:59:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.827175208581645) internal successors, (2372), 839 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:40,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2372 transitions. [2021-08-21 17:59:40,631 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2372 transitions. Word has length 33 [2021-08-21 17:59:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:40,632 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2372 transitions. [2021-08-21 17:59:40,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:40,632 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2372 transitions. [2021-08-21 17:59:40,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:40,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:40,633 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:40,670 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 17:59:40,848 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,SelfDestructingSolverStorable43 [2021-08-21 17:59:40,849 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash -377940129, now seen corresponding path program 6 times [2021-08-21 17:59:40,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:40,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634743159] [2021-08-21 17:59:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:40,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:41,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:41,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634743159] [2021-08-21 17:59:41,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634743159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:41,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769241716] [2021-08-21 17:59:41,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:59:41,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:41,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:41,056 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 17:59:41,057 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 17:59:42,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 17:59:42,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:42,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:43,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:43,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 17:59:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:43,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769241716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:43,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:43,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:43,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351141993] [2021-08-21 17:59:43,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:43,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:43,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:43,655 INFO L87 Difference]: Start difference. First operand 840 states and 2372 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:45,083 INFO L93 Difference]: Finished difference Result 956 states and 2671 transitions. [2021-08-21 17:59:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:59:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:45,085 INFO L225 Difference]: With dead ends: 956 [2021-08-21 17:59:45,085 INFO L226 Difference]: Without dead ends: 943 [2021-08-21 17:59:45,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1405.1ms TimeCoverageRelationStatistics Valid=300, Invalid=1956, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:59:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-21 17:59:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 845. [2021-08-21 17:59:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.8234597156398102) internal successors, (2383), 844 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2383 transitions. [2021-08-21 17:59:45,097 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2383 transitions. Word has length 33 [2021-08-21 17:59:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:45,097 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2383 transitions. [2021-08-21 17:59:45,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2383 transitions. [2021-08-21 17:59:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:45,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:45,099 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:45,122 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 17:59:45,311 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,SelfDestructingSolverStorable44 [2021-08-21 17:59:45,311 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash 929002809, now seen corresponding path program 7 times [2021-08-21 17:59:45,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:45,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505670533] [2021-08-21 17:59:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:45,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:45,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:45,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505670533] [2021-08-21 17:59:45,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505670533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:45,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96812234] [2021-08-21 17:59:45,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:59:45,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:45,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:45,539 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 17:59:45,540 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 17:59:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 17:59:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:47,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96812234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:47,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:47,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 17:59:47,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960799390] [2021-08-21 17:59:47,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 17:59:47,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 17:59:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:59:47,919 INFO L87 Difference]: Start difference. First operand 845 states and 2383 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:48,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:48,720 INFO L93 Difference]: Finished difference Result 995 states and 2734 transitions. [2021-08-21 17:59:48,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:59:48,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:48,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:48,723 INFO L225 Difference]: With dead ends: 995 [2021-08-21 17:59:48,723 INFO L226 Difference]: Without dead ends: 982 [2021-08-21 17:59:48,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 773.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:59:48,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-08-21 17:59:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 841. [2021-08-21 17:59:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.8273809523809526) internal successors, (2375), 840 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:48,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2375 transitions. [2021-08-21 17:59:48,735 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2375 transitions. Word has length 33 [2021-08-21 17:59:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2375 transitions. [2021-08-21 17:59:48,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2375 transitions. [2021-08-21 17:59:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:48,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:48,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:48,760 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 17:59:48,958 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,SelfDestructingSolverStorable45 [2021-08-21 17:59:48,959 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:48,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:48,959 INFO L82 PathProgramCache]: Analyzing trace with hash 264883513, now seen corresponding path program 8 times [2021-08-21 17:59:48,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:48,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963528608] [2021-08-21 17:59:48,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:48,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:49,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:49,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963528608] [2021-08-21 17:59:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963528608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:49,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180334491] [2021-08-21 17:59:49,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:59:49,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:49,164 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 17:59:49,168 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 17:59:51,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:59:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:51,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:59:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:51,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 17:59:51,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-21 17:59:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:51,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180334491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:51,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:51,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:51,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141701245] [2021-08-21 17:59:51,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:51,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:51,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:51,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:51,848 INFO L87 Difference]: Start difference. First operand 841 states and 2375 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:53,205 INFO L93 Difference]: Finished difference Result 956 states and 2671 transitions. [2021-08-21 17:59:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:59:53,206 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:53,208 INFO L225 Difference]: With dead ends: 956 [2021-08-21 17:59:53,208 INFO L226 Difference]: Without dead ends: 943 [2021-08-21 17:59:53,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1297.0ms TimeCoverageRelationStatistics Valid=297, Invalid=1959, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:59:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-21 17:59:53,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 847. [2021-08-21 17:59:53,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 2.8226950354609928) internal successors, (2388), 846 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2388 transitions. [2021-08-21 17:59:53,219 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2388 transitions. Word has length 33 [2021-08-21 17:59:53,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:53,220 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 2388 transitions. [2021-08-21 17:59:53,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2388 transitions. [2021-08-21 17:59:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:53,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:53,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:53,245 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 17:59:53,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:53,437 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash 722684959, now seen corresponding path program 9 times [2021-08-21 17:59:53,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:53,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264341327] [2021-08-21 17:59:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:53,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:53,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:53,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264341327] [2021-08-21 17:59:53,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264341327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:53,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630613193] [2021-08-21 17:59:53,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:59:53,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:53,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:53,651 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 17:59:53,652 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 17:59:55,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:59:55,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:59:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 17:59:55,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:59:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 17:59:55,994 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 17:59:55,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2021-08-21 17:59:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:56,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630613193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:56,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:59:56,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 17:59:56,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334534967] [2021-08-21 17:59:56,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 17:59:56,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:59:56,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 17:59:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:59:56,505 INFO L87 Difference]: Start difference. First operand 847 states and 2388 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:59:58,011 INFO L93 Difference]: Finished difference Result 920 states and 2557 transitions. [2021-08-21 17:59:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:59:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 17:59:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:59:58,013 INFO L225 Difference]: With dead ends: 920 [2021-08-21 17:59:58,013 INFO L226 Difference]: Without dead ends: 907 [2021-08-21 17:59:58,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1453.3ms TimeCoverageRelationStatistics Valid=262, Invalid=2090, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:59:58,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-08-21 17:59:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 844. [2021-08-21 17:59:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.8256227758007118) internal successors, (2382), 843 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2382 transitions. [2021-08-21 17:59:58,024 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2382 transitions. Word has length 33 [2021-08-21 17:59:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:59:58,024 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2382 transitions. [2021-08-21 17:59:58,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:59:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2382 transitions. [2021-08-21 17:59:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:59:58,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:59:58,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:59:58,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 17:59:58,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 17:59:58,235 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 17:59:58,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:59:58,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1829691753, now seen corresponding path program 10 times [2021-08-21 17:59:58,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:59:58,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485041842] [2021-08-21 17:59:58,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:59:58,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:59:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:59:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:59:58,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:59:58,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485041842] [2021-08-21 17:59:58,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485041842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:59:58,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661011383] [2021-08-21 17:59:58,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:59:58,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:59:58,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:59:58,481 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 17:59:58,507 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 18:00:00,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:00,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:00,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:00,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:00,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:00:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:01,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661011383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:01,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:01,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:00:01,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233023558] [2021-08-21 18:00:01,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:01,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:01,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:01,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:01,058 INFO L87 Difference]: Start difference. First operand 844 states and 2382 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:02,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:02,095 INFO L93 Difference]: Finished difference Result 1075 states and 2930 transitions. [2021-08-21 18:00:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:00:02,095 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:02,097 INFO L225 Difference]: With dead ends: 1075 [2021-08-21 18:00:02,097 INFO L226 Difference]: Without dead ends: 1049 [2021-08-21 18:00:02,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 903.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:00:02,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-08-21 18:00:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 857. [2021-08-21 18:00:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.838785046728972) internal successors, (2430), 856 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:02,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2430 transitions. [2021-08-21 18:00:02,109 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2430 transitions. Word has length 33 [2021-08-21 18:00:02,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:02,109 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 2430 transitions. [2021-08-21 18:00:02,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:02,109 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2430 transitions. [2021-08-21 18:00:02,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:02,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:02,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:02,137 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 18:00:02,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:00:02,321 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1235610167, now seen corresponding path program 1 times [2021-08-21 18:00:02,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:02,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947240951] [2021-08-21 18:00:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:02,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:02,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:02,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947240951] [2021-08-21 18:00:02,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947240951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:02,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414429271] [2021-08-21 18:00:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:02,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:02,529 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 18:00:02,530 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 18:00:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:05,045 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 18:00:05,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 55 [2021-08-21 18:00:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:05,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414429271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:05,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:05,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:00:05,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131358543] [2021-08-21 18:00:05,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:00:05,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:00:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:00:05,230 INFO L87 Difference]: Start difference. First operand 857 states and 2430 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:06,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:06,292 INFO L93 Difference]: Finished difference Result 1076 states and 2941 transitions. [2021-08-21 18:00:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:00:06,293 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:06,295 INFO L225 Difference]: With dead ends: 1076 [2021-08-21 18:00:06,295 INFO L226 Difference]: Without dead ends: 1050 [2021-08-21 18:00:06,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 944.5ms TimeCoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:00:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-08-21 18:00:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 852. [2021-08-21 18:00:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 2.8343125734430084) internal successors, (2412), 851 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2412 transitions. [2021-08-21 18:00:06,306 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2412 transitions. Word has length 33 [2021-08-21 18:00:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:06,306 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2412 transitions. [2021-08-21 18:00:06,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2412 transitions. [2021-08-21 18:00:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:06,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:06,308 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:06,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-21 18:00:06,514 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,SelfDestructingSolverStorable49 [2021-08-21 18:00:06,515 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:06,515 INFO L82 PathProgramCache]: Analyzing trace with hash -703924321, now seen corresponding path program 11 times [2021-08-21 18:00:06,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:06,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905640599] [2021-08-21 18:00:06,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:06,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:06,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:06,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905640599] [2021-08-21 18:00:06,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905640599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:06,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86856512] [2021-08-21 18:00:06,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:06,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:06,786 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 18:00:06,787 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 18:00:08,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:08,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:08,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:09,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:00:09,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:00:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:09,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86856512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:09,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:09,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:00:09,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121943412] [2021-08-21 18:00:09,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:09,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:09,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:09,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:09,506 INFO L87 Difference]: Start difference. First operand 852 states and 2412 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:11,206 INFO L93 Difference]: Finished difference Result 1092 states and 3032 transitions. [2021-08-21 18:00:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:00:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:11,209 INFO L225 Difference]: With dead ends: 1092 [2021-08-21 18:00:11,209 INFO L226 Difference]: Without dead ends: 1066 [2021-08-21 18:00:11,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1488.1ms TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:00:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-21 18:00:11,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 864. [2021-08-21 18:00:11,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8261877172653533) internal successors, (2439), 863 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2439 transitions. [2021-08-21 18:00:11,221 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2439 transitions. Word has length 33 [2021-08-21 18:00:11,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:11,221 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2439 transitions. [2021-08-21 18:00:11,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2439 transitions. [2021-08-21 18:00:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:11,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:11,223 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:11,250 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 18:00:11,444 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,SelfDestructingSolverStorable50 [2021-08-21 18:00:11,445 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:11,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:11,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1266589665, now seen corresponding path program 11 times [2021-08-21 18:00:11,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:11,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724712598] [2021-08-21 18:00:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:11,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:11,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:11,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724712598] [2021-08-21 18:00:11,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724712598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:11,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012336231] [2021-08-21 18:00:11,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:11,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:11,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:11,752 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 18:00:11,753 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 18:00:14,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:00:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:14,483 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 18:00:14,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 55 [2021-08-21 18:00:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:14,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012336231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:14,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:14,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:00:14,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129915837] [2021-08-21 18:00:14,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:14,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:14,663 INFO L87 Difference]: Start difference. First operand 864 states and 2439 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:16,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:16,411 INFO L93 Difference]: Finished difference Result 1079 states and 2990 transitions. [2021-08-21 18:00:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:00:16,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:16,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:16,413 INFO L225 Difference]: With dead ends: 1079 [2021-08-21 18:00:16,413 INFO L226 Difference]: Without dead ends: 1053 [2021-08-21 18:00:16,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1586.5ms TimeCoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:00:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-08-21 18:00:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 865. [2021-08-21 18:00:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.8310185185185186) internal successors, (2446), 864 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2446 transitions. [2021-08-21 18:00:16,425 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2446 transitions. Word has length 33 [2021-08-21 18:00:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 865 states and 2446 transitions. [2021-08-21 18:00:16,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2446 transitions. [2021-08-21 18:00:16,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:16,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:16,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:16,449 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 18:00:16,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:16,632 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1137788665, now seen corresponding path program 12 times [2021-08-21 18:00:16,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:16,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897601624] [2021-08-21 18:00:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:16,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:16,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:16,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:16,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897601624] [2021-08-21 18:00:16,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897601624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:16,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56968610] [2021-08-21 18:00:16,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:16,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:16,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:16,937 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 18:00:16,938 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 18:00:19,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:00:19,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:19,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:19,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:19,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:00:19,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 18:00:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:20,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56968610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:20,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:20,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:00:20,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973276981] [2021-08-21 18:00:20,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:00:20,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:00:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:20,004 INFO L87 Difference]: Start difference. First operand 865 states and 2446 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:22,187 INFO L93 Difference]: Finished difference Result 1053 states and 2959 transitions. [2021-08-21 18:00:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:00:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:22,189 INFO L225 Difference]: With dead ends: 1053 [2021-08-21 18:00:22,189 INFO L226 Difference]: Without dead ends: 1027 [2021-08-21 18:00:22,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2042.1ms TimeCoverageRelationStatistics Valid=477, Invalid=2715, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:00:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-08-21 18:00:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 869. [2021-08-21 18:00:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.8317972350230414) internal successors, (2458), 868 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2458 transitions. [2021-08-21 18:00:22,199 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2458 transitions. Word has length 33 [2021-08-21 18:00:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:22,200 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2458 transitions. [2021-08-21 18:00:22,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2458 transitions. [2021-08-21 18:00:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:22,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:22,201 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:22,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:00:22,401 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,SelfDestructingSolverStorable52 [2021-08-21 18:00:22,402 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:22,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1186664645, now seen corresponding path program 12 times [2021-08-21 18:00:22,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:22,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464409955] [2021-08-21 18:00:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:22,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:22,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:22,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464409955] [2021-08-21 18:00:22,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464409955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:22,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034241129] [2021-08-21 18:00:22,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:22,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:22,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:22,694 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 18:00:22,694 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 18:00:25,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:00:25,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:25,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:25,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:00:25,365 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 18:00:25,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 49 [2021-08-21 18:00:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:25,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034241129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:25,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:25,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:00:25,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52700167] [2021-08-21 18:00:25,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:00:25,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:00:25,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:25,678 INFO L87 Difference]: Start difference. First operand 869 states and 2458 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:27,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:27,348 INFO L93 Difference]: Finished difference Result 1012 states and 2846 transitions. [2021-08-21 18:00:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:00:27,348 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:27,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:27,350 INFO L225 Difference]: With dead ends: 1012 [2021-08-21 18:00:27,350 INFO L226 Difference]: Without dead ends: 986 [2021-08-21 18:00:27,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1609.5ms TimeCoverageRelationStatistics Valid=427, Invalid=2435, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:00:27,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-08-21 18:00:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 869. [2021-08-21 18:00:27,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.8317972350230414) internal successors, (2458), 868 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2458 transitions. [2021-08-21 18:00:27,361 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2458 transitions. Word has length 33 [2021-08-21 18:00:27,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:27,361 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2458 transitions. [2021-08-21 18:00:27,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2458 transitions. [2021-08-21 18:00:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:27,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:27,362 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:27,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 18:00:27,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:27,563 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:27,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1425694983, now seen corresponding path program 13 times [2021-08-21 18:00:27,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:27,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282536816] [2021-08-21 18:00:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:27,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:27,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:27,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282536816] [2021-08-21 18:00:27,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282536816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:27,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989889310] [2021-08-21 18:00:27,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:00:27,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:27,822 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 18:00:27,823 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 18:00:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:30,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:30,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:00:30,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:00:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:30,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989889310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:30,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:30,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:00:30,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660346435] [2021-08-21 18:00:30,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:30,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:30,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:30,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:30,805 INFO L87 Difference]: Start difference. First operand 869 states and 2458 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:32,121 INFO L93 Difference]: Finished difference Result 1175 states and 3255 transitions. [2021-08-21 18:00:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:00:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:32,124 INFO L225 Difference]: With dead ends: 1175 [2021-08-21 18:00:32,124 INFO L226 Difference]: Without dead ends: 1149 [2021-08-21 18:00:32,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1167.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2584, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:00:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-08-21 18:00:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 888. [2021-08-21 18:00:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 2.829763246899662) internal successors, (2510), 887 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2510 transitions. [2021-08-21 18:00:32,135 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2510 transitions. Word has length 33 [2021-08-21 18:00:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:32,135 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2510 transitions. [2021-08-21 18:00:32,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2510 transitions. [2021-08-21 18:00:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:32,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:32,136 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:32,162 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 18:00:32,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:32,337 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 434830431, now seen corresponding path program 14 times [2021-08-21 18:00:32,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:32,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302668551] [2021-08-21 18:00:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:32,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:32,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:32,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302668551] [2021-08-21 18:00:32,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302668551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:32,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601123047] [2021-08-21 18:00:32,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:32,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:32,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:32,592 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 18:00:32,593 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 18:00:35,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:35,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:35,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:35,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:35,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:00:35,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 18:00:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:35,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601123047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:35,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:35,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:00:35,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364284671] [2021-08-21 18:00:35,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:00:35,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:35,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:00:35,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:35,790 INFO L87 Difference]: Start difference. First operand 888 states and 2510 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:38,231 INFO L93 Difference]: Finished difference Result 1093 states and 3068 transitions. [2021-08-21 18:00:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:00:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:38,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:38,233 INFO L225 Difference]: With dead ends: 1093 [2021-08-21 18:00:38,233 INFO L226 Difference]: Without dead ends: 1067 [2021-08-21 18:00:38,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 2091.3ms TimeCoverageRelationStatistics Valid=420, Invalid=2886, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:00:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-08-21 18:00:38,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 889. [2021-08-21 18:00:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.8322072072072073) internal successors, (2515), 888 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:38,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2515 transitions. [2021-08-21 18:00:38,245 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2515 transitions. Word has length 33 [2021-08-21 18:00:38,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:38,245 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2515 transitions. [2021-08-21 18:00:38,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:38,245 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2515 transitions. [2021-08-21 18:00:38,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:38,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:38,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:38,270 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 18:00:38,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:38,447 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash 27136215, now seen corresponding path program 15 times [2021-08-21 18:00:38,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:38,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799988131] [2021-08-21 18:00:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:38,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:38,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:38,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:38,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799988131] [2021-08-21 18:00:38,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799988131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:38,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301200344] [2021-08-21 18:00:38,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:00:38,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:38,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:38,761 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 18:00:38,765 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 18:00:41,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:00:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:41,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:00:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:41,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:00:41,606 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 18:00:41,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 57 [2021-08-21 18:00:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:42,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301200344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:42,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:42,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:00:42,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940209813] [2021-08-21 18:00:42,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:00:42,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:42,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:00:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:00:42,038 INFO L87 Difference]: Start difference. First operand 889 states and 2515 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:43,878 INFO L93 Difference]: Finished difference Result 1028 states and 2880 transitions. [2021-08-21 18:00:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:00:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:43,880 INFO L225 Difference]: With dead ends: 1028 [2021-08-21 18:00:43,880 INFO L226 Difference]: Without dead ends: 1002 [2021-08-21 18:00:43,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1681.2ms TimeCoverageRelationStatistics Valid=431, Invalid=2761, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:00:43,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-08-21 18:00:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 889. [2021-08-21 18:00:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.8322072072072073) internal successors, (2515), 888 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2515 transitions. [2021-08-21 18:00:43,892 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2515 transitions. Word has length 33 [2021-08-21 18:00:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:43,892 INFO L470 AbstractCegarLoop]: Abstraction has 889 states and 2515 transitions. [2021-08-21 18:00:43,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2515 transitions. [2021-08-21 18:00:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:43,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:43,893 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:43,917 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 18:00:44,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:44,094 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:44,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:44,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1918162617, now seen corresponding path program 16 times [2021-08-21 18:00:44,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:44,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916894683] [2021-08-21 18:00:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:44,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:44,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:44,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916894683] [2021-08-21 18:00:44,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916894683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:44,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755705901] [2021-08-21 18:00:44,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:00:44,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:44,322 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 18:00:44,323 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 18:00:46,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:00:46,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:46,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:00:47,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:00:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:47,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755705901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:47,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:47,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:00:47,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229158422] [2021-08-21 18:00:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:47,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:47,417 INFO L87 Difference]: Start difference. First operand 889 states and 2515 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:48,390 INFO L93 Difference]: Finished difference Result 1090 states and 3008 transitions. [2021-08-21 18:00:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:00:48,390 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:48,392 INFO L225 Difference]: With dead ends: 1090 [2021-08-21 18:00:48,392 INFO L226 Difference]: Without dead ends: 1060 [2021-08-21 18:00:48,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 860.1ms TimeCoverageRelationStatistics Valid=402, Invalid=2048, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:00:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-08-21 18:00:48,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 899. [2021-08-21 18:00:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.84075723830735) internal successors, (2551), 898 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2551 transitions. [2021-08-21 18:00:48,403 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2551 transitions. Word has length 33 [2021-08-21 18:00:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:48,403 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2551 transitions. [2021-08-21 18:00:48,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2551 transitions. [2021-08-21 18:00:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:48,404 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:48,405 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:48,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 18:00:48,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 18:00:48,606 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:48,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1841725671, now seen corresponding path program 2 times [2021-08-21 18:00:48,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:48,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485096974] [2021-08-21 18:00:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:48,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:48,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:48,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485096974] [2021-08-21 18:00:48,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485096974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:48,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950263171] [2021-08-21 18:00:48,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:00:48,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:48,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:48,835 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 18:00:48,836 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 18:00:51,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:00:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:51,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:51,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:00:51,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 18:00:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:52,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950263171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:52,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:52,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:00:52,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118553089] [2021-08-21 18:00:52,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:00:52,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:00:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:00:52,308 INFO L87 Difference]: Start difference. First operand 899 states and 2551 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:54,216 INFO L93 Difference]: Finished difference Result 1066 states and 2971 transitions. [2021-08-21 18:00:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:00:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:54,218 INFO L225 Difference]: With dead ends: 1066 [2021-08-21 18:00:54,218 INFO L226 Difference]: Without dead ends: 1051 [2021-08-21 18:00:54,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1699.6ms TimeCoverageRelationStatistics Valid=394, Invalid=2362, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:00:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-08-21 18:00:54,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 899. [2021-08-21 18:00:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.84075723830735) internal successors, (2551), 898 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2551 transitions. [2021-08-21 18:00:54,230 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2551 transitions. Word has length 33 [2021-08-21 18:00:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:54,231 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2551 transitions. [2021-08-21 18:00:54,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2551 transitions. [2021-08-21 18:00:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:54,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:54,232 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:54,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 18:00:54,433 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,SelfDestructingSolverStorable58 [2021-08-21 18:00:54,433 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash 766296279, now seen corresponding path program 17 times [2021-08-21 18:00:54,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:54,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613809865] [2021-08-21 18:00:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:54,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:54,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:54,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613809865] [2021-08-21 18:00:54,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613809865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:54,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397777836] [2021-08-21 18:00:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:00:54,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:54,674 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 18:00:54,675 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 18:00:57,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:00:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:00:57,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:00:57,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:00:57,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:00:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:57,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397777836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:57,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:00:57,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:00:57,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128170243] [2021-08-21 18:00:57,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:00:57,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:00:57,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:00:57,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:00:57,868 INFO L87 Difference]: Start difference. First operand 899 states and 2551 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:00:58,828 INFO L93 Difference]: Finished difference Result 1157 states and 3152 transitions. [2021-08-21 18:00:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:00:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:00:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:00:58,830 INFO L225 Difference]: With dead ends: 1157 [2021-08-21 18:00:58,830 INFO L226 Difference]: Without dead ends: 1109 [2021-08-21 18:00:58,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 873.7ms TimeCoverageRelationStatistics Valid=391, Invalid=2365, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:00:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-21 18:00:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 916. [2021-08-21 18:00:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.851366120218579) internal successors, (2609), 915 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 2609 transitions. [2021-08-21 18:00:58,841 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 2609 transitions. Word has length 33 [2021-08-21 18:00:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:00:58,841 INFO L470 AbstractCegarLoop]: Abstraction has 916 states and 2609 transitions. [2021-08-21 18:00:58,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:00:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 2609 transitions. [2021-08-21 18:00:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:00:58,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:00:58,843 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:00:58,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:00:59,043 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,SelfDestructingSolverStorable59 [2021-08-21 18:00:59,043 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:00:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:00:59,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1043355867, now seen corresponding path program 18 times [2021-08-21 18:00:59,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:00:59,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149332744] [2021-08-21 18:00:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:00:59,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:00:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:00:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:00:59,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:00:59,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149332744] [2021-08-21 18:00:59,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149332744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:00:59,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990687416] [2021-08-21 18:00:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:00:59,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:00:59,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:00:59,292 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 18:00:59,292 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 18:01:02,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:01:02,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:02,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:02,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:02,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:02,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 18:01:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:02,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990687416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:02,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:02,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:01:02,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448713024] [2021-08-21 18:01:02,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:01:02,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:01:02,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:02,891 INFO L87 Difference]: Start difference. First operand 916 states and 2609 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:04,849 INFO L93 Difference]: Finished difference Result 1060 states and 2976 transitions. [2021-08-21 18:01:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:01:04,850 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:04,852 INFO L225 Difference]: With dead ends: 1060 [2021-08-21 18:01:04,852 INFO L226 Difference]: Without dead ends: 1047 [2021-08-21 18:01:04,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1785.8ms TimeCoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:01:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-08-21 18:01:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 925. [2021-08-21 18:01:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.853896103896104) internal successors, (2637), 924 states have internal predecessors, (2637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2637 transitions. [2021-08-21 18:01:04,863 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2637 transitions. Word has length 33 [2021-08-21 18:01:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:04,863 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 2637 transitions. [2021-08-21 18:01:04,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2637 transitions. [2021-08-21 18:01:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:04,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:04,865 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:04,889 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 18:01:05,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:05,089 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:05,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2011261153, now seen corresponding path program 19 times [2021-08-21 18:01:05,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:05,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328085996] [2021-08-21 18:01:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:05,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:05,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:05,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328085996] [2021-08-21 18:01:05,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328085996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:05,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693860229] [2021-08-21 18:01:05,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:05,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:05,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:05,351 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 18:01:05,352 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 18:01:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:08,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:08,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:01:08,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:01:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:08,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693860229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:08,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:08,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:01:08,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473007354] [2021-08-21 18:01:08,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:08,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:08,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:08,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:08,672 INFO L87 Difference]: Start difference. First operand 925 states and 2637 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:09,397 INFO L93 Difference]: Finished difference Result 1051 states and 2933 transitions. [2021-08-21 18:01:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:01:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:09,399 INFO L225 Difference]: With dead ends: 1051 [2021-08-21 18:01:09,399 INFO L226 Difference]: Without dead ends: 1038 [2021-08-21 18:01:09,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 786.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-08-21 18:01:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 927. [2021-08-21 18:01:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.852051835853132) internal successors, (2641), 926 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2641 transitions. [2021-08-21 18:01:09,410 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2641 transitions. Word has length 33 [2021-08-21 18:01:09,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:09,410 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2641 transitions. [2021-08-21 18:01:09,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2641 transitions. [2021-08-21 18:01:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:09,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:09,412 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:09,436 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 18:01:09,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:09,612 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -704318215, now seen corresponding path program 20 times [2021-08-21 18:01:09,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:09,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865133351] [2021-08-21 18:01:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:09,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:09,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:09,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865133351] [2021-08-21 18:01:09,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865133351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:09,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011578058] [2021-08-21 18:01:09,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:09,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:09,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:09,857 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 18:01:09,858 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 18:01:12,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:12,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:13,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:13,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:01:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:13,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011578058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:13,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:13,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:01:13,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009517483] [2021-08-21 18:01:13,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:01:13,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:13,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:01:13,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:13,574 INFO L87 Difference]: Start difference. First operand 927 states and 2641 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:15,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:15,235 INFO L93 Difference]: Finished difference Result 1026 states and 2897 transitions. [2021-08-21 18:01:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:01:15,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:15,237 INFO L225 Difference]: With dead ends: 1026 [2021-08-21 18:01:15,237 INFO L226 Difference]: Without dead ends: 1013 [2021-08-21 18:01:15,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1640.8ms TimeCoverageRelationStatistics Valid=355, Invalid=2195, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:01:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-21 18:01:15,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 927. [2021-08-21 18:01:15,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.852051835853132) internal successors, (2641), 926 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2641 transitions. [2021-08-21 18:01:15,248 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2641 transitions. Word has length 33 [2021-08-21 18:01:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:15,248 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2641 transitions. [2021-08-21 18:01:15,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2641 transitions. [2021-08-21 18:01:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:15,250 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:15,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:15,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:15,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:15,451 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:15,451 INFO L82 PathProgramCache]: Analyzing trace with hash -169548167, now seen corresponding path program 21 times [2021-08-21 18:01:15,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:15,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435827999] [2021-08-21 18:01:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:15,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:15,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:15,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435827999] [2021-08-21 18:01:15,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435827999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:15,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769499221] [2021-08-21 18:01:15,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:15,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:15,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:15,758 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 18:01:15,816 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 18:01:18,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:01:18,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:18,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:18,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:18,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:01:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:19,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769499221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:19,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:19,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:01:19,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235899965] [2021-08-21 18:01:19,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:01:19,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:01:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:19,482 INFO L87 Difference]: Start difference. First operand 927 states and 2641 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:21,157 INFO L93 Difference]: Finished difference Result 1030 states and 2909 transitions. [2021-08-21 18:01:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:01:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:21,159 INFO L225 Difference]: With dead ends: 1030 [2021-08-21 18:01:21,159 INFO L226 Difference]: Without dead ends: 1017 [2021-08-21 18:01:21,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1663.2ms TimeCoverageRelationStatistics Valid=355, Invalid=2195, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:01:21,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-08-21 18:01:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 931. [2021-08-21 18:01:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.8483870967741933) internal successors, (2649), 930 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2649 transitions. [2021-08-21 18:01:21,171 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2649 transitions. Word has length 33 [2021-08-21 18:01:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:21,171 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2649 transitions. [2021-08-21 18:01:21,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2649 transitions. [2021-08-21 18:01:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:21,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:21,173 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:21,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 18:01:21,392 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,SelfDestructingSolverStorable63 [2021-08-21 18:01:21,393 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1137394771, now seen corresponding path program 22 times [2021-08-21 18:01:21,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:21,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150260482] [2021-08-21 18:01:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:21,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:21,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:21,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150260482] [2021-08-21 18:01:21,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150260482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:21,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813781777] [2021-08-21 18:01:21,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:01:21,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:21,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:21,619 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 18:01:21,619 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 18:01:24,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:01:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:24,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:01:24,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:01:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:25,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813781777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:25,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:25,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:01:25,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341592111] [2021-08-21 18:01:25,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:25,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:25,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:25,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:25,164 INFO L87 Difference]: Start difference. First operand 931 states and 2649 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:25,908 INFO L93 Difference]: Finished difference Result 1048 states and 2926 transitions. [2021-08-21 18:01:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:01:25,909 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:25,910 INFO L225 Difference]: With dead ends: 1048 [2021-08-21 18:01:25,910 INFO L226 Difference]: Without dead ends: 1035 [2021-08-21 18:01:25,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 748.9ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:01:25,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-08-21 18:01:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 929. [2021-08-21 18:01:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.8502155172413794) internal successors, (2645), 928 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2645 transitions. [2021-08-21 18:01:25,922 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2645 transitions. Word has length 33 [2021-08-21 18:01:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:25,922 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 2645 transitions. [2021-08-21 18:01:25,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2645 transitions. [2021-08-21 18:01:25,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:25,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:25,923 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:25,950 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 18:01:26,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:26,136 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash -676871973, now seen corresponding path program 23 times [2021-08-21 18:01:26,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:26,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581143624] [2021-08-21 18:01:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:26,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:26,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581143624] [2021-08-21 18:01:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581143624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:26,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314658949] [2021-08-21 18:01:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:01:26,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:26,361 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 18:01:26,361 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 18:01:29,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:29,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:01:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:01:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:29,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314658949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:29,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:29,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:01:29,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347150150] [2021-08-21 18:01:29,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:29,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:29,931 INFO L87 Difference]: Start difference. First operand 929 states and 2645 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:30,999 INFO L93 Difference]: Finished difference Result 1193 states and 3255 transitions. [2021-08-21 18:01:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:01:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:31,001 INFO L225 Difference]: With dead ends: 1193 [2021-08-21 18:01:31,001 INFO L226 Difference]: Without dead ends: 1154 [2021-08-21 18:01:31,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 962.6ms TimeCoverageRelationStatistics Valid=344, Invalid=2106, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:01:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-08-21 18:01:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 939. [2021-08-21 18:01:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.85501066098081) internal successors, (2678), 938 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2678 transitions. [2021-08-21 18:01:31,013 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2678 transitions. Word has length 33 [2021-08-21 18:01:31,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:31,013 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 2678 transitions. [2021-08-21 18:01:31,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:31,013 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2678 transitions. [2021-08-21 18:01:31,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:31,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:31,014 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:31,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 18:01:31,215 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,SelfDestructingSolverStorable65 [2021-08-21 18:01:31,215 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:31,215 INFO L82 PathProgramCache]: Analyzing trace with hash -141792965, now seen corresponding path program 3 times [2021-08-21 18:01:31,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:31,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232902809] [2021-08-21 18:01:31,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:31,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:31,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:31,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232902809] [2021-08-21 18:01:31,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232902809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:31,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288909595] [2021-08-21 18:01:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:31,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:31,462 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 18:01:31,463 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 18:01:34,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:01:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:01:34,847 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 18:01:34,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2021-08-21 18:01:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:35,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288909595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:35,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:35,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:01:35,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817110682] [2021-08-21 18:01:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:01:35,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:01:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:01:35,252 INFO L87 Difference]: Start difference. First operand 939 states and 2678 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:36,779 INFO L93 Difference]: Finished difference Result 1036 states and 2911 transitions. [2021-08-21 18:01:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:01:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:36,781 INFO L225 Difference]: With dead ends: 1036 [2021-08-21 18:01:36,781 INFO L226 Difference]: Without dead ends: 1023 [2021-08-21 18:01:36,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1427.5ms TimeCoverageRelationStatistics Valid=353, Invalid=2509, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:01:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-08-21 18:01:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 939. [2021-08-21 18:01:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 2.85501066098081) internal successors, (2678), 938 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2678 transitions. [2021-08-21 18:01:36,793 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2678 transitions. Word has length 33 [2021-08-21 18:01:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:36,793 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 2678 transitions. [2021-08-21 18:01:36,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2678 transitions. [2021-08-21 18:01:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:36,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:36,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:36,819 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 18:01:36,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 18:01:36,995 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1828738311, now seen corresponding path program 24 times [2021-08-21 18:01:36,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:36,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374115885] [2021-08-21 18:01:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:36,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:37,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:37,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374115885] [2021-08-21 18:01:37,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374115885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:37,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268463548] [2021-08-21 18:01:37,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:01:37,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:37,208 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 18:01:37,209 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 18:01:40,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-21 18:01:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:40,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:40,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:40,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 18:01:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:41,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268463548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:41,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:41,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:01:41,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472379911] [2021-08-21 18:01:41,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:01:41,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:41,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:01:41,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:41,057 INFO L87 Difference]: Start difference. First operand 939 states and 2678 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:42,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:42,691 INFO L93 Difference]: Finished difference Result 1110 states and 3093 transitions. [2021-08-21 18:01:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:01:42,692 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:42,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:42,694 INFO L225 Difference]: With dead ends: 1110 [2021-08-21 18:01:42,694 INFO L226 Difference]: Without dead ends: 1097 [2021-08-21 18:01:42,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1480.0ms TimeCoverageRelationStatistics Valid=356, Invalid=2400, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:01:42,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-08-21 18:01:42,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 946. [2021-08-21 18:01:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.859259259259259) internal successors, (2702), 945 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2702 transitions. [2021-08-21 18:01:42,705 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2702 transitions. Word has length 33 [2021-08-21 18:01:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 2702 transitions. [2021-08-21 18:01:42,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2702 transitions. [2021-08-21 18:01:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:42,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:42,707 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:42,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:01:42,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 18:01:42,908 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:42,908 INFO L82 PathProgramCache]: Analyzing trace with hash -168044135, now seen corresponding path program 13 times [2021-08-21 18:01:42,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:42,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892006087] [2021-08-21 18:01:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:42,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:43,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:43,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892006087] [2021-08-21 18:01:43,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892006087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:43,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991698274] [2021-08-21 18:01:43,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:01:43,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:43,136 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 18:01:43,137 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 18:01:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:46,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:46,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:01:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:46,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991698274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:46,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:46,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:01:46,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897307030] [2021-08-21 18:01:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:01:46,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:01:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:01:46,784 INFO L87 Difference]: Start difference. First operand 946 states and 2702 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:47,938 INFO L93 Difference]: Finished difference Result 1220 states and 3343 transitions. [2021-08-21 18:01:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:01:47,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:47,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:47,941 INFO L225 Difference]: With dead ends: 1220 [2021-08-21 18:01:47,941 INFO L226 Difference]: Without dead ends: 1192 [2021-08-21 18:01:47,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1060.7ms TimeCoverageRelationStatistics Valid=381, Invalid=2271, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:01:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2021-08-21 18:01:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 955. [2021-08-21 18:01:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 2.8658280922431865) internal successors, (2734), 954 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2734 transitions. [2021-08-21 18:01:47,953 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2734 transitions. Word has length 33 [2021-08-21 18:01:47,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:47,953 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 2734 transitions. [2021-08-21 18:01:47,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2734 transitions. [2021-08-21 18:01:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:47,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:47,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:47,983 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 18:01:48,155 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,SelfDestructingSolverStorable68 [2021-08-21 18:01:48,156 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:48,156 INFO L82 PathProgramCache]: Analyzing trace with hash -371891243, now seen corresponding path program 14 times [2021-08-21 18:01:48,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:48,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584371656] [2021-08-21 18:01:48,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:48,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:48,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:48,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584371656] [2021-08-21 18:01:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584371656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:48,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46781287] [2021-08-21 18:01:48,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:01:48,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:48,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:48,410 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 18:01:48,411 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 18:01:51,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:01:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:51,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:51,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:01:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:52,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46781287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:52,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:52,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:01:52,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099794670] [2021-08-21 18:01:52,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:01:52,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:52,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:01:52,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:52,473 INFO L87 Difference]: Start difference. First operand 955 states and 2734 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:01:54,939 INFO L93 Difference]: Finished difference Result 1079 states and 3071 transitions. [2021-08-21 18:01:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:01:54,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:01:54,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:01:54,941 INFO L225 Difference]: With dead ends: 1079 [2021-08-21 18:01:54,941 INFO L226 Difference]: Without dead ends: 1066 [2021-08-21 18:01:54,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2380.7ms TimeCoverageRelationStatistics Valid=556, Invalid=3104, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:01:54,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-21 18:01:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 956. [2021-08-21 18:01:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.864921465968586) internal successors, (2736), 955 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2736 transitions. [2021-08-21 18:01:54,952 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2736 transitions. Word has length 33 [2021-08-21 18:01:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:01:54,953 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 2736 transitions. [2021-08-21 18:01:54,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:01:54,953 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2736 transitions. [2021-08-21 18:01:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:01:54,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:01:54,954 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:01:54,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 18:01:55,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:55,164 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:01:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:01:55,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1488634171, now seen corresponding path program 15 times [2021-08-21 18:01:55,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:01:55,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100123691] [2021-08-21 18:01:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:01:55,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:01:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:01:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:55,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:01:55,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100123691] [2021-08-21 18:01:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100123691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:55,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895656938] [2021-08-21 18:01:55,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:01:55,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:01:55,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:01:55,419 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 18:01:55,420 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 18:01:58,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:01:58,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:01:58,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:01:58,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:01:58,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:01:58,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:01:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:01:59,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895656938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:01:59,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:01:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:01:59,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144334537] [2021-08-21 18:01:59,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:01:59,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:01:59,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:01:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:01:59,500 INFO L87 Difference]: Start difference. First operand 956 states and 2736 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:01,711 INFO L93 Difference]: Finished difference Result 1082 states and 3083 transitions. [2021-08-21 18:02:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:02:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:01,713 INFO L225 Difference]: With dead ends: 1082 [2021-08-21 18:02:01,713 INFO L226 Difference]: Without dead ends: 1069 [2021-08-21 18:02:01,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 2068.3ms TimeCoverageRelationStatistics Valid=560, Invalid=3100, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:02:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-08-21 18:02:01,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 956. [2021-08-21 18:02:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 2.864921465968586) internal successors, (2736), 955 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 2736 transitions. [2021-08-21 18:02:01,725 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 2736 transitions. Word has length 33 [2021-08-21 18:02:01,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:01,725 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 2736 transitions. [2021-08-21 18:02:01,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:01,725 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 2736 transitions. [2021-08-21 18:02:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:01,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:01,727 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:01,755 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 18:02:01,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:01,927 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash 886636475, now seen corresponding path program 16 times [2021-08-21 18:02:01,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:01,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551789920] [2021-08-21 18:02:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:01,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:02,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:02,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551789920] [2021-08-21 18:02:02,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551789920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:02,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047324831] [2021-08-21 18:02:02,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:02,176 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:02,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:02,177 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 18:02:02,177 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 18:02:05,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:05,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:05,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:02:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:06,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047324831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:06,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:06,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:02:06,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583243812] [2021-08-21 18:02:06,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:02:06,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:06,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:02:06,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:02:06,021 INFO L87 Difference]: Start difference. First operand 956 states and 2736 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:06,952 INFO L93 Difference]: Finished difference Result 1079 states and 3030 transitions. [2021-08-21 18:02:06,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:02:06,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:06,955 INFO L225 Difference]: With dead ends: 1079 [2021-08-21 18:02:06,955 INFO L226 Difference]: Without dead ends: 1066 [2021-08-21 18:02:06,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:02:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-21 18:02:06,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 958. [2021-08-21 18:02:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.8631138975966564) internal successors, (2740), 957 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2740 transitions. [2021-08-21 18:02:06,966 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2740 transitions. Word has length 33 [2021-08-21 18:02:06,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:06,966 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2740 transitions. [2021-08-21 18:02:06,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:06,966 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2740 transitions. [2021-08-21 18:02:06,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:06,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:06,968 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:06,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 18:02:07,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:07,168 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:07,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:07,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1547805407, now seen corresponding path program 17 times [2021-08-21 18:02:07,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:07,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375777144] [2021-08-21 18:02:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:07,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:07,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375777144] [2021-08-21 18:02:07,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375777144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:07,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143621646] [2021-08-21 18:02:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:07,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:07,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:07,398 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 18:02:07,399 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 18:02:10,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:02:10,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:10,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:11,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:02:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:11,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143621646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:11,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:11,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:02:11,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318355496] [2021-08-21 18:02:11,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:02:11,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:11,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:02:11,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:02:11,293 INFO L87 Difference]: Start difference. First operand 958 states and 2740 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:12,188 INFO L93 Difference]: Finished difference Result 1115 states and 3117 transitions. [2021-08-21 18:02:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:02:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:12,190 INFO L225 Difference]: With dead ends: 1115 [2021-08-21 18:02:12,190 INFO L226 Difference]: Without dead ends: 1102 [2021-08-21 18:02:12,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 884.0ms TimeCoverageRelationStatistics Valid=280, Invalid=1790, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:02:12,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-08-21 18:02:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 957. [2021-08-21 18:02:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.8640167364016738) internal successors, (2738), 956 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2738 transitions. [2021-08-21 18:02:12,202 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2738 transitions. Word has length 33 [2021-08-21 18:02:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2738 transitions. [2021-08-21 18:02:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2738 transitions. [2021-08-21 18:02:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:12,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:12,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:12,230 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 18:02:12,416 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,SelfDestructingSolverStorable72 [2021-08-21 18:02:12,417 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:12,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1955499623, now seen corresponding path program 18 times [2021-08-21 18:02:12,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:12,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702846685] [2021-08-21 18:02:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:12,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:12,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:12,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702846685] [2021-08-21 18:02:12,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702846685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358368732] [2021-08-21 18:02:12,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:12,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:12,664 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 18:02:12,665 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 18:02:16,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:02:16,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:16,433 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 18:02:16,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 55 [2021-08-21 18:02:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:16,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358368732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:16,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:16,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:02:16,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261548266] [2021-08-21 18:02:16,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:02:16,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:02:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:02:16,834 INFO L87 Difference]: Start difference. First operand 957 states and 2738 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:18,266 INFO L93 Difference]: Finished difference Result 1085 states and 3051 transitions. [2021-08-21 18:02:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:02:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:18,268 INFO L225 Difference]: With dead ends: 1085 [2021-08-21 18:02:18,268 INFO L226 Difference]: Without dead ends: 1057 [2021-08-21 18:02:18,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1305.8ms TimeCoverageRelationStatistics Valid=357, Invalid=2613, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:02:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-08-21 18:02:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 957. [2021-08-21 18:02:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.8640167364016738) internal successors, (2738), 956 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2738 transitions. [2021-08-21 18:02:18,279 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2738 transitions. Word has length 33 [2021-08-21 18:02:18,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:18,279 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2738 transitions. [2021-08-21 18:02:18,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:18,279 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2738 transitions. [2021-08-21 18:02:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:18,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:18,281 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:18,307 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 18:02:18,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:18,495 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:18,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1747047737, now seen corresponding path program 5 times [2021-08-21 18:02:18,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:18,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169545764] [2021-08-21 18:02:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:18,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:18,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:18,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169545764] [2021-08-21 18:02:18,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169545764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:18,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687539485] [2021-08-21 18:02:18,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:02:18,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:18,718 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 18:02:18,718 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 18:02:22,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:02:22,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:22,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:02:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:22,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687539485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:22,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:22,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:02:22,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217247794] [2021-08-21 18:02:22,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:02:22,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:02:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:02:22,697 INFO L87 Difference]: Start difference. First operand 957 states and 2738 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:23,952 INFO L93 Difference]: Finished difference Result 1237 states and 3386 transitions. [2021-08-21 18:02:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:02:23,953 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:23,954 INFO L225 Difference]: With dead ends: 1237 [2021-08-21 18:02:23,955 INFO L226 Difference]: Without dead ends: 1196 [2021-08-21 18:02:23,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1149.3ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:02:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-21 18:02:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 962. [2021-08-21 18:02:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.866805411030177) internal successors, (2755), 961 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2755 transitions. [2021-08-21 18:02:23,966 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2755 transitions. Word has length 33 [2021-08-21 18:02:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:23,966 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 2755 transitions. [2021-08-21 18:02:23,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2755 transitions. [2021-08-21 18:02:23,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:23,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:23,968 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:23,994 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 18:02:24,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:24,170 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2118848507, now seen corresponding path program 19 times [2021-08-21 18:02:24,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:24,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627759532] [2021-08-21 18:02:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:24,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:24,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:24,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627759532] [2021-08-21 18:02:24,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627759532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:24,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554084149] [2021-08-21 18:02:24,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:02:24,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:24,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:24,424 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 18:02:24,425 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 18:02:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:27,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:28,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:02:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:28,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554084149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:28,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:28,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:02:28,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794395679] [2021-08-21 18:02:28,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:02:28,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:28,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:02:28,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:02:28,429 INFO L87 Difference]: Start difference. First operand 962 states and 2755 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:29,584 INFO L93 Difference]: Finished difference Result 1239 states and 3412 transitions. [2021-08-21 18:02:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:02:29,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:29,586 INFO L225 Difference]: With dead ends: 1239 [2021-08-21 18:02:29,586 INFO L226 Difference]: Without dead ends: 1213 [2021-08-21 18:02:29,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1011.4ms TimeCoverageRelationStatistics Valid=326, Invalid=2326, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:02:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-08-21 18:02:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 967. [2021-08-21 18:02:29,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.872670807453416) internal successors, (2775), 966 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:29,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2775 transitions. [2021-08-21 18:02:29,597 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2775 transitions. Word has length 33 [2021-08-21 18:02:29,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:29,597 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 2775 transitions. [2021-08-21 18:02:29,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:29,597 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2775 transitions. [2021-08-21 18:02:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:29,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:29,599 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:29,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 18:02:29,799 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,SelfDestructingSolverStorable75 [2021-08-21 18:02:29,799 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:29,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1626243259, now seen corresponding path program 20 times [2021-08-21 18:02:29,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:29,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952715878] [2021-08-21 18:02:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:29,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:30,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:30,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952715878] [2021-08-21 18:02:30,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952715878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:30,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247565431] [2021-08-21 18:02:30,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:02:30,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:30,110 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 18:02:30,111 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 18:02:33,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:02:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:33,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:02:33,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 18:02:34,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:34,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247565431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:34,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:34,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:02:34,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958411717] [2021-08-21 18:02:34,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:02:34,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:34,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:02:34,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:02:34,405 INFO L87 Difference]: Start difference. First operand 967 states and 2775 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:36,520 INFO L93 Difference]: Finished difference Result 1147 states and 3260 transitions. [2021-08-21 18:02:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:02:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:36,522 INFO L225 Difference]: With dead ends: 1147 [2021-08-21 18:02:36,522 INFO L226 Difference]: Without dead ends: 1121 [2021-08-21 18:02:36,523 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 2019.3ms TimeCoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:02:36,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-08-21 18:02:36,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 965. [2021-08-21 18:02:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 2.871369294605809) internal successors, (2768), 964 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 2768 transitions. [2021-08-21 18:02:36,534 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 2768 transitions. Word has length 33 [2021-08-21 18:02:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:36,534 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 2768 transitions. [2021-08-21 18:02:36,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 2768 transitions. [2021-08-21 18:02:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:36,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:36,536 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:36,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:02:36,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-21 18:02:36,736 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:36,736 INFO L82 PathProgramCache]: Analyzing trace with hash -827011051, now seen corresponding path program 21 times [2021-08-21 18:02:36,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:36,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957112812] [2021-08-21 18:02:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:36,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:37,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:37,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957112812] [2021-08-21 18:02:37,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957112812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:37,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006284298] [2021-08-21 18:02:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:02:37,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:37,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:37,043 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 18:02:37,043 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 18:02:40,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:02:40,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:40,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:40,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:02:40,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 18:02:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:41,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006284298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:41,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:02:41,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912823672] [2021-08-21 18:02:41,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:02:41,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:02:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:02:41,360 INFO L87 Difference]: Start difference. First operand 965 states and 2768 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:43,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:43,371 INFO L93 Difference]: Finished difference Result 1140 states and 3243 transitions. [2021-08-21 18:02:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:02:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:43,373 INFO L225 Difference]: With dead ends: 1140 [2021-08-21 18:02:43,373 INFO L226 Difference]: Without dead ends: 1114 [2021-08-21 18:02:43,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1978.9ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:02:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-08-21 18:02:43,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 964. [2021-08-21 18:02:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.872274143302181) internal successors, (2766), 963 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2766 transitions. [2021-08-21 18:02:43,385 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2766 transitions. Word has length 33 [2021-08-21 18:02:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:43,385 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 2766 transitions. [2021-08-21 18:02:43,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2766 transitions. [2021-08-21 18:02:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:43,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:43,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:43,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 18:02:43,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:43,587 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:43,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:43,588 INFO L82 PathProgramCache]: Analyzing trace with hash -580629859, now seen corresponding path program 22 times [2021-08-21 18:02:43,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:43,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811019814] [2021-08-21 18:02:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:43,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:43,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:43,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811019814] [2021-08-21 18:02:43,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811019814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:43,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228987539] [2021-08-21 18:02:43,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:02:43,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:43,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:43,893 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 18:02:43,923 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 18:02:47,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:02:47,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:02:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:47,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:47,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:02:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:48,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228987539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:48,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:48,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:02:48,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158035550] [2021-08-21 18:02:48,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:02:48,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:02:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:02:48,073 INFO L87 Difference]: Start difference. First operand 964 states and 2766 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:49,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:49,569 INFO L93 Difference]: Finished difference Result 1196 states and 3368 transitions. [2021-08-21 18:02:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:02:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:49,571 INFO L225 Difference]: With dead ends: 1196 [2021-08-21 18:02:49,571 INFO L226 Difference]: Without dead ends: 1170 [2021-08-21 18:02:49,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1389.8ms TimeCoverageRelationStatistics Valid=505, Invalid=2465, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:02:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-08-21 18:02:49,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 967. [2021-08-21 18:02:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.875776397515528) internal successors, (2778), 966 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:49,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2778 transitions. [2021-08-21 18:02:49,583 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2778 transitions. Word has length 33 [2021-08-21 18:02:49,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:49,583 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 2778 transitions. [2021-08-21 18:02:49,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2778 transitions. [2021-08-21 18:02:49,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:49,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:49,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:49,613 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 18:02:49,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:49,785 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1765778691, now seen corresponding path program 6 times [2021-08-21 18:02:49,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:49,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545216824] [2021-08-21 18:02:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:49,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:50,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:50,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545216824] [2021-08-21 18:02:50,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545216824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:50,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245134759] [2021-08-21 18:02:50,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:50,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:50,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:50,064 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 18:02:50,065 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 18:02:53,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:02:53,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:02:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-21 18:02:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:02:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:02:54,116 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 18:02:54,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 53 [2021-08-21 18:02:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:54,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245134759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:54,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:02:54,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:02:54,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777472433] [2021-08-21 18:02:54,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:02:54,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:02:54,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:02:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:02:54,466 INFO L87 Difference]: Start difference. First operand 967 states and 2778 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:02:56,212 INFO L93 Difference]: Finished difference Result 1099 states and 3119 transitions. [2021-08-21 18:02:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:02:56,212 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:02:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:02:56,214 INFO L225 Difference]: With dead ends: 1099 [2021-08-21 18:02:56,214 INFO L226 Difference]: Without dead ends: 1073 [2021-08-21 18:02:56,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1666.4ms TimeCoverageRelationStatistics Valid=427, Invalid=2543, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:02:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-21 18:02:56,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 967. [2021-08-21 18:02:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.875776397515528) internal successors, (2778), 966 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:56,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2778 transitions. [2021-08-21 18:02:56,226 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2778 transitions. Word has length 33 [2021-08-21 18:02:56,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:02:56,226 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 2778 transitions. [2021-08-21 18:02:56,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:02:56,226 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2778 transitions. [2021-08-21 18:02:56,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:02:56,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:02:56,227 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:02:56,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 18:02:56,428 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,SelfDestructingSolverStorable79 [2021-08-21 18:02:56,428 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:02:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:02:56,428 INFO L82 PathProgramCache]: Analyzing trace with hash -614712065, now seen corresponding path program 6 times [2021-08-21 18:02:56,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:02:56,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850846620] [2021-08-21 18:02:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:02:56,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:02:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:02:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:02:56,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:02:56,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850846620] [2021-08-21 18:02:56,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850846620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:02:56,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293383845] [2021-08-21 18:02:56,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:02:56,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:02:56,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:02:56,643 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 18:02:56,644 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 18:03:00,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:03:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:00,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:00,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:03:00,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 47 [2021-08-21 18:03:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:01,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293383845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:01,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:01,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:03:01,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607364289] [2021-08-21 18:03:01,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:03:01,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:03:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:03:01,264 INFO L87 Difference]: Start difference. First operand 967 states and 2778 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:02,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:02,477 INFO L93 Difference]: Finished difference Result 1081 states and 3061 transitions. [2021-08-21 18:03:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:02,479 INFO L225 Difference]: With dead ends: 1081 [2021-08-21 18:03:02,479 INFO L226 Difference]: Without dead ends: 1068 [2021-08-21 18:03:02,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1165.0ms TimeCoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:03:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-08-21 18:03:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 981. [2021-08-21 18:03:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 2.8755102040816327) internal successors, (2818), 980 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2818 transitions. [2021-08-21 18:03:02,490 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2818 transitions. Word has length 33 [2021-08-21 18:03:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:02,490 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 2818 transitions. [2021-08-21 18:03:02,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2818 transitions. [2021-08-21 18:03:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:02,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:02,492 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:02,519 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 18:03:02,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:02,692 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:02,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1786745567, now seen corresponding path program 25 times [2021-08-21 18:03:02,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:02,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663616614] [2021-08-21 18:03:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:02,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:02,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:02,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:02,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663616614] [2021-08-21 18:03:02,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663616614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:02,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719409672] [2021-08-21 18:03:02,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:03:02,906 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:02,906 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 18:03:02,907 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 18:03:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:07,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:03:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:07,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719409672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:07,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:07,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:03:07,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591271241] [2021-08-21 18:03:07,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:03:07,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:07,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:03:07,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:03:07,206 INFO L87 Difference]: Start difference. First operand 981 states and 2818 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:08,311 INFO L93 Difference]: Finished difference Result 1225 states and 3397 transitions. [2021-08-21 18:03:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:03:08,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:08,313 INFO L225 Difference]: With dead ends: 1225 [2021-08-21 18:03:08,313 INFO L226 Difference]: Without dead ends: 1199 [2021-08-21 18:03:08,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 873.3ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:03:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-08-21 18:03:08,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 984. [2021-08-21 18:03:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.881993896236012) internal successors, (2833), 983 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:08,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2833 transitions. [2021-08-21 18:03:08,333 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2833 transitions. Word has length 33 [2021-08-21 18:03:08,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:08,333 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2833 transitions. [2021-08-21 18:03:08,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2833 transitions. [2021-08-21 18:03:08,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:08,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:08,334 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:08,362 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 18:03:08,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:08,537 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:08,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:08,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1576541671, now seen corresponding path program 26 times [2021-08-21 18:03:08,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:08,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615756414] [2021-08-21 18:03:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:08,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:08,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:08,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615756414] [2021-08-21 18:03:08,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615756414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:08,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170530687] [2021-08-21 18:03:08,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:03:08,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:08,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:08,776 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 18:03:08,777 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 18:03:12,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:03:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:12,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:12,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:03:12,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 18:03:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:13,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170530687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:13,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:13,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:03:13,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334286073] [2021-08-21 18:03:13,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:03:13,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:03:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:03:13,383 INFO L87 Difference]: Start difference. First operand 984 states and 2833 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:14,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:14,471 INFO L93 Difference]: Finished difference Result 1058 states and 3016 transitions. [2021-08-21 18:03:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:03:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:14,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:14,473 INFO L225 Difference]: With dead ends: 1058 [2021-08-21 18:03:14,473 INFO L226 Difference]: Without dead ends: 1045 [2021-08-21 18:03:14,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1172.5ms TimeCoverageRelationStatistics Valid=259, Invalid=1633, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:03:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-08-21 18:03:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 989. [2021-08-21 18:03:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 2.8785425101214575) internal successors, (2844), 988 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 2844 transitions. [2021-08-21 18:03:14,485 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 2844 transitions. Word has length 33 [2021-08-21 18:03:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:14,485 INFO L470 AbstractCegarLoop]: Abstraction has 989 states and 2844 transitions. [2021-08-21 18:03:14,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 2844 transitions. [2021-08-21 18:03:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:14,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:14,486 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:14,514 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 18:03:14,687 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,SelfDestructingSolverStorable82 [2021-08-21 18:03:14,687 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:14,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1411482687, now seen corresponding path program 27 times [2021-08-21 18:03:14,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:14,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639176364] [2021-08-21 18:03:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:14,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:14,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:14,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639176364] [2021-08-21 18:03:14,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639176364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:14,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839787906] [2021-08-21 18:03:14,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:03:14,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:14,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:14,909 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 18:03:14,910 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 18:03:18,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:03:18,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:19,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:03:19,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-21 18:03:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839787906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:19,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:19,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:03:19,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934025989] [2021-08-21 18:03:19,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:03:19,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:03:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:03:19,591 INFO L87 Difference]: Start difference. First operand 989 states and 2844 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:20,615 INFO L93 Difference]: Finished difference Result 1058 states and 3017 transitions. [2021-08-21 18:03:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:03:20,615 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:20,617 INFO L225 Difference]: With dead ends: 1058 [2021-08-21 18:03:20,617 INFO L226 Difference]: Without dead ends: 1045 [2021-08-21 18:03:20,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1052.2ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:03:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-08-21 18:03:20,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 985. [2021-08-21 18:03:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 2.8821138211382116) internal successors, (2836), 984 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 2836 transitions. [2021-08-21 18:03:20,628 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 2836 transitions. Word has length 33 [2021-08-21 18:03:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:20,628 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 2836 transitions. [2021-08-21 18:03:20,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 2836 transitions. [2021-08-21 18:03:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:20,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:20,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:20,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-21 18:03:20,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:20,830 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2075601983, now seen corresponding path program 28 times [2021-08-21 18:03:20,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:20,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16424928] [2021-08-21 18:03:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:20,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:21,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:21,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16424928] [2021-08-21 18:03:21,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16424928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:21,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908882812] [2021-08-21 18:03:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:21,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:21,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:21,079 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 18:03:21,080 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 18:03:25,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:03:25,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:25,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:03:25,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:03:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:25,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908882812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:25,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:25,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:03:25,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473850370] [2021-08-21 18:03:25,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:03:25,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:03:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:03:25,546 INFO L87 Difference]: Start difference. First operand 985 states and 2836 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:26,299 INFO L93 Difference]: Finished difference Result 1129 states and 3176 transitions. [2021-08-21 18:03:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:03:26,299 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:26,301 INFO L225 Difference]: With dead ends: 1129 [2021-08-21 18:03:26,302 INFO L226 Difference]: Without dead ends: 1116 [2021-08-21 18:03:26,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 762.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-21 18:03:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 991. [2021-08-21 18:03:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.8777777777777778) internal successors, (2849), 990 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2849 transitions. [2021-08-21 18:03:26,323 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2849 transitions. Word has length 33 [2021-08-21 18:03:26,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:26,323 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 2849 transitions. [2021-08-21 18:03:26,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2849 transitions. [2021-08-21 18:03:26,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:26,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:26,325 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:26,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 18:03:26,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:26,525 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:26,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1617800537, now seen corresponding path program 29 times [2021-08-21 18:03:26,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:26,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754080254] [2021-08-21 18:03:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:26,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:26,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:26,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754080254] [2021-08-21 18:03:26,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754080254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:26,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668226248] [2021-08-21 18:03:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:03:26,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:26,747 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 18:03:26,747 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 18:03:30,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:03:30,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:03:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:31,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668226248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:31,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:31,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:03:31,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407259748] [2021-08-21 18:03:31,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:03:31,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:03:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:03:31,260 INFO L87 Difference]: Start difference. First operand 991 states and 2849 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:32,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:32,011 INFO L93 Difference]: Finished difference Result 1126 states and 3167 transitions. [2021-08-21 18:03:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:03:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:32,014 INFO L225 Difference]: With dead ends: 1126 [2021-08-21 18:03:32,014 INFO L226 Difference]: Without dead ends: 1113 [2021-08-21 18:03:32,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:03:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-08-21 18:03:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 988. [2021-08-21 18:03:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 2.8804457953394125) internal successors, (2843), 987 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2843 transitions. [2021-08-21 18:03:32,026 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2843 transitions. Word has length 33 [2021-08-21 18:03:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:32,026 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2843 transitions. [2021-08-21 18:03:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2843 transitions. [2021-08-21 18:03:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:32,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:32,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:32,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 18:03:32,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:32,229 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:32,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:32,230 INFO L82 PathProgramCache]: Analyzing trace with hash 124790047, now seen corresponding path program 30 times [2021-08-21 18:03:32,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:32,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545763541] [2021-08-21 18:03:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:32,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:32,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:32,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545763541] [2021-08-21 18:03:32,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545763541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:32,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549686968] [2021-08-21 18:03:32,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:03:32,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:32,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:32,460 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 18:03:32,460 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 18:03:36,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:03:36,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:36,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:36,906 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-08-21 18:03:36,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 69 [2021-08-21 18:03:37,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:37,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549686968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:37,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:37,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:03:37,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74624878] [2021-08-21 18:03:37,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:03:37,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:03:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:03:37,341 INFO L87 Difference]: Start difference. First operand 988 states and 2843 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:38,740 INFO L93 Difference]: Finished difference Result 1086 states and 3061 transitions. [2021-08-21 18:03:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:03:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:38,743 INFO L225 Difference]: With dead ends: 1086 [2021-08-21 18:03:38,743 INFO L226 Difference]: Without dead ends: 1073 [2021-08-21 18:03:38,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1177.8ms TimeCoverageRelationStatistics Valid=241, Invalid=2209, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:03:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-21 18:03:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 988. [2021-08-21 18:03:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 2.8804457953394125) internal successors, (2843), 987 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2843 transitions. [2021-08-21 18:03:38,755 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2843 transitions. Word has length 33 [2021-08-21 18:03:38,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:38,755 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2843 transitions. [2021-08-21 18:03:38,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2843 transitions. [2021-08-21 18:03:38,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:38,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:38,756 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:38,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:03:38,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:38,973 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:38,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1104875329, now seen corresponding path program 4 times [2021-08-21 18:03:38,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:38,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005567520] [2021-08-21 18:03:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:38,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:39,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:39,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005567520] [2021-08-21 18:03:39,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005567520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:39,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265583391] [2021-08-21 18:03:39,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:03:39,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:39,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:39,188 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 18:03:39,189 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 18:03:43,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:03:43,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:03:43,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:43,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:43,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:03:43,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:03:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:43,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265583391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:43,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:43,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:03:43,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955585780] [2021-08-21 18:03:43,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:03:43,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:43,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:03:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:03:43,860 INFO L87 Difference]: Start difference. First operand 988 states and 2843 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:44,926 INFO L93 Difference]: Finished difference Result 1213 states and 3378 transitions. [2021-08-21 18:03:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:03:44,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:44,928 INFO L225 Difference]: With dead ends: 1213 [2021-08-21 18:03:44,928 INFO L226 Difference]: Without dead ends: 1187 [2021-08-21 18:03:44,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=264, Invalid=2088, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:03:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-08-21 18:03:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 990. [2021-08-21 18:03:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 2.885743174924166) internal successors, (2854), 989 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 2854 transitions. [2021-08-21 18:03:44,939 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 2854 transitions. Word has length 33 [2021-08-21 18:03:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:44,940 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 2854 transitions. [2021-08-21 18:03:44,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 2854 transitions. [2021-08-21 18:03:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:44,941 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:44,941 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:44,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 18:03:45,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:45,142 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1415008089, now seen corresponding path program 7 times [2021-08-21 18:03:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:45,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089387897] [2021-08-21 18:03:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:45,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:45,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:45,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089387897] [2021-08-21 18:03:45,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089387897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:45,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816402758] [2021-08-21 18:03:45,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:03:45,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:45,369 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 18:03:45,369 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 18:03:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:49,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:03:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:03:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:50,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816402758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:50,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:50,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:03:50,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817256229] [2021-08-21 18:03:50,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:03:50,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:03:50,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:03:50,057 INFO L87 Difference]: Start difference. First operand 990 states and 2854 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:50,888 INFO L93 Difference]: Finished difference Result 1201 states and 3354 transitions. [2021-08-21 18:03:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:50,891 INFO L225 Difference]: With dead ends: 1201 [2021-08-21 18:03:50,891 INFO L226 Difference]: Without dead ends: 1188 [2021-08-21 18:03:50,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:03:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-08-21 18:03:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1003. [2021-08-21 18:03:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 2.8872255489021956) internal successors, (2893), 1002 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 2893 transitions. [2021-08-21 18:03:50,903 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 2893 transitions. Word has length 33 [2021-08-21 18:03:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:50,903 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 2893 transitions. [2021-08-21 18:03:50,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 2893 transitions. [2021-08-21 18:03:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:50,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:50,904 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:50,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 18:03:51,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 18:03:51,105 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -478501575, now seen corresponding path program 31 times [2021-08-21 18:03:51,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:51,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966932720] [2021-08-21 18:03:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:51,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:51,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966932720] [2021-08-21 18:03:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966932720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:51,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217744052] [2021-08-21 18:03:51,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:03:51,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:51,319 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 18:03:51,320 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 18:03:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:55,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:03:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:03:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:03:55,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:03:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:56,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217744052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:56,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:03:56,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:03:56,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688404432] [2021-08-21 18:03:56,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:03:56,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:03:56,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:03:56,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:03:56,029 INFO L87 Difference]: Start difference. First operand 1003 states and 2893 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:03:56,867 INFO L93 Difference]: Finished difference Result 1186 states and 3328 transitions. [2021-08-21 18:03:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:03:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:03:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:03:56,870 INFO L225 Difference]: With dead ends: 1186 [2021-08-21 18:03:56,870 INFO L226 Difference]: Without dead ends: 1173 [2021-08-21 18:03:56,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=198, Invalid=1524, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:03:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-08-21 18:03:56,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 994. [2021-08-21 18:03:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 2.8862034239677743) internal successors, (2866), 993 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 2866 transitions. [2021-08-21 18:03:56,882 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 2866 transitions. Word has length 33 [2021-08-21 18:03:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:03:56,882 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 2866 transitions. [2021-08-21 18:03:56,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:03:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 2866 transitions. [2021-08-21 18:03:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:03:56,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:03:56,883 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:03:56,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 18:03:57,083 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,SelfDestructingSolverStorable89 [2021-08-21 18:03:57,084 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:03:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:03:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash -688705471, now seen corresponding path program 32 times [2021-08-21 18:03:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:03:57,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084804113] [2021-08-21 18:03:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:03:57,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:03:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:03:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:03:57,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:03:57,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084804113] [2021-08-21 18:03:57,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084804113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:03:57,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929767932] [2021-08-21 18:03:57,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:03:57,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:03:57,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:03:57,302 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 18:03:57,303 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 18:04:01,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:04:01,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:01,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:01,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:01,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 18:04:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:02,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929767932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:02,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:02,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:04:02,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025235474] [2021-08-21 18:04:02,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:04:02,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:02,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:04:02,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:04:02,343 INFO L87 Difference]: Start difference. First operand 994 states and 2866 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:03,469 INFO L93 Difference]: Finished difference Result 1079 states and 3079 transitions. [2021-08-21 18:04:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:04:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:03,471 INFO L225 Difference]: With dead ends: 1079 [2021-08-21 18:04:03,471 INFO L226 Difference]: Without dead ends: 1066 [2021-08-21 18:04:03,471 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1128.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:04:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-21 18:04:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1004. [2021-08-21 18:04:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 2.8853439680957127) internal successors, (2894), 1003 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 2894 transitions. [2021-08-21 18:04:03,482 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 2894 transitions. Word has length 33 [2021-08-21 18:04:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:03,482 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 2894 transitions. [2021-08-21 18:04:03,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 2894 transitions. [2021-08-21 18:04:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:03,484 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:03,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:03,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-21 18:04:03,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:03,684 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:03,684 INFO L82 PathProgramCache]: Analyzing trace with hash 618237467, now seen corresponding path program 33 times [2021-08-21 18:04:03,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:03,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075045103] [2021-08-21 18:04:03,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:03,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:03,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:03,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075045103] [2021-08-21 18:04:03,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075045103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:03,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187092091] [2021-08-21 18:04:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:04:03,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:03,953 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 18:04:03,988 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 18:04:08,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:04:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:08,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:08,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:08,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:08,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 18:04:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:09,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187092091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:09,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:09,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:04:09,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863436405] [2021-08-21 18:04:09,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:04:09,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:09,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:04:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:04:09,007 INFO L87 Difference]: Start difference. First operand 1004 states and 2894 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:10,108 INFO L93 Difference]: Finished difference Result 1079 states and 3080 transitions. [2021-08-21 18:04:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:04:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:10,110 INFO L225 Difference]: With dead ends: 1079 [2021-08-21 18:04:10,110 INFO L226 Difference]: Without dead ends: 1066 [2021-08-21 18:04:10,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1105.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1638, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:04:10,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-08-21 18:04:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 999. [2021-08-21 18:04:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.8897795591182365) internal successors, (2884), 998 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2884 transitions. [2021-08-21 18:04:10,121 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2884 transitions. Word has length 33 [2021-08-21 18:04:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:10,121 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 2884 transitions. [2021-08-21 18:04:10,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2884 transitions. [2021-08-21 18:04:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:10,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:10,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:10,150 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 18:04:10,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:10,323 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash -45881829, now seen corresponding path program 34 times [2021-08-21 18:04:10,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:10,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257011025] [2021-08-21 18:04:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:10,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:10,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:10,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257011025] [2021-08-21 18:04:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257011025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:10,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343042496] [2021-08-21 18:04:10,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:04:10,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:10,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:10,543 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 18:04:10,544 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 18:04:14,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:04:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:04:15,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2021-08-21 18:04:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343042496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:15,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:15,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:04:15,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724310378] [2021-08-21 18:04:15,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:04:15,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:15,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:04:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:04:15,432 INFO L87 Difference]: Start difference. First operand 999 states and 2884 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:16,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:16,256 INFO L93 Difference]: Finished difference Result 1141 states and 3222 transitions. [2021-08-21 18:04:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:16,258 INFO L225 Difference]: With dead ends: 1141 [2021-08-21 18:04:16,258 INFO L226 Difference]: Without dead ends: 1128 [2021-08-21 18:04:16,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 744.1ms TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:16,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-08-21 18:04:16,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1005. [2021-08-21 18:04:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.885458167330677) internal successors, (2897), 1004 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2897 transitions. [2021-08-21 18:04:16,269 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2897 transitions. Word has length 33 [2021-08-21 18:04:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:16,269 INFO L470 AbstractCegarLoop]: Abstraction has 1005 states and 2897 transitions. [2021-08-21 18:04:16,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2897 transitions. [2021-08-21 18:04:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:16,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:16,271 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:16,299 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 18:04:16,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:16,474 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash 411919617, now seen corresponding path program 35 times [2021-08-21 18:04:16,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:16,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530856700] [2021-08-21 18:04:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:16,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:16,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530856700] [2021-08-21 18:04:16,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530856700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:16,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471945288] [2021-08-21 18:04:16,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:04:16,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:16,717 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 18:04:16,718 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 18:04:21,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:04:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:21,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:21,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:04:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:21,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471945288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:21,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:21,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:04:21,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239144734] [2021-08-21 18:04:21,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:04:21,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:04:21,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:04:21,641 INFO L87 Difference]: Start difference. First operand 1005 states and 2897 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:22,443 INFO L93 Difference]: Finished difference Result 1138 states and 3211 transitions. [2021-08-21 18:04:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:04:22,444 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:22,445 INFO L225 Difference]: With dead ends: 1138 [2021-08-21 18:04:22,445 INFO L226 Difference]: Without dead ends: 1125 [2021-08-21 18:04:22,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=194, Invalid=1366, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:04:22,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-08-21 18:04:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1002. [2021-08-21 18:04:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.888111888111888) internal successors, (2891), 1001 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:22,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2891 transitions. [2021-08-21 18:04:22,457 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2891 transitions. Word has length 33 [2021-08-21 18:04:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:22,457 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 2891 transitions. [2021-08-21 18:04:22,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2891 transitions. [2021-08-21 18:04:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:22,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:22,458 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:22,487 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 18:04:22,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:22,658 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2140457095, now seen corresponding path program 36 times [2021-08-21 18:04:22,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:22,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490696974] [2021-08-21 18:04:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:22,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:22,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:22,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490696974] [2021-08-21 18:04:22,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490696974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:22,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167853406] [2021-08-21 18:04:22,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:22,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:22,902 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 18:04:22,902 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 18:04:27,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:04:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:27,759 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-08-21 18:04:27,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 69 [2021-08-21 18:04:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:28,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167853406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:28,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:28,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:04:28,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432953331] [2021-08-21 18:04:28,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:04:28,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:04:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:04:28,194 INFO L87 Difference]: Start difference. First operand 1002 states and 2891 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:29,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:29,511 INFO L93 Difference]: Finished difference Result 1095 states and 3095 transitions. [2021-08-21 18:04:29,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:04:29,512 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:29,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:29,513 INFO L225 Difference]: With dead ends: 1095 [2021-08-21 18:04:29,513 INFO L226 Difference]: Without dead ends: 1082 [2021-08-21 18:04:29,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1210.2ms TimeCoverageRelationStatistics Valid=242, Invalid=2110, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:04:29,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-08-21 18:04:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1002. [2021-08-21 18:04:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 2.888111888111888) internal successors, (2891), 1001 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 2891 transitions. [2021-08-21 18:04:29,524 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 2891 transitions. Word has length 33 [2021-08-21 18:04:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:29,524 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 2891 transitions. [2021-08-21 18:04:29,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 2891 transitions. [2021-08-21 18:04:29,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:29,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:29,525 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:29,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 18:04:29,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:29,726 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:29,726 INFO L82 PathProgramCache]: Analyzing trace with hash 924844825, now seen corresponding path program 5 times [2021-08-21 18:04:29,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:29,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918398150] [2021-08-21 18:04:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:29,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:29,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:29,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918398150] [2021-08-21 18:04:29,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918398150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:29,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418462791] [2021-08-21 18:04:29,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:04:29,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:29,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:29,953 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 18:04:29,953 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 18:04:34,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:04:34,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:34,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:34,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:04:34,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:04:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:35,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418462791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:35,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:35,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:04:35,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426488391] [2021-08-21 18:04:35,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:04:35,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:35,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:04:35,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:04:35,013 INFO L87 Difference]: Start difference. First operand 1002 states and 2891 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:35,891 INFO L93 Difference]: Finished difference Result 1169 states and 3291 transitions. [2021-08-21 18:04:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:04:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:35,893 INFO L225 Difference]: With dead ends: 1169 [2021-08-21 18:04:35,893 INFO L226 Difference]: Without dead ends: 1156 [2021-08-21 18:04:35,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 765.4ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:04:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2021-08-21 18:04:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 998. [2021-08-21 18:04:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.8876629889669005) internal successors, (2879), 997 states have internal predecessors, (2879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2879 transitions. [2021-08-21 18:04:35,905 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2879 transitions. Word has length 33 [2021-08-21 18:04:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:35,905 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2879 transitions. [2021-08-21 18:04:35,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2879 transitions. [2021-08-21 18:04:35,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:35,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:35,906 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:35,936 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 18:04:36,112 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,SelfDestructingSolverStorable95 [2021-08-21 18:04:36,113 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:36,113 INFO L82 PathProgramCache]: Analyzing trace with hash 376078103, now seen corresponding path program 12 times [2021-08-21 18:04:36,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:36,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173030486] [2021-08-21 18:04:36,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:36,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:36,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:36,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173030486] [2021-08-21 18:04:36,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173030486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:36,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855444417] [2021-08-21 18:04:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:04:36,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:36,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:36,414 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 18:04:36,414 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 18:04:40,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:04:40,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:04:41,338 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 18:04:41,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 53 [2021-08-21 18:04:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:41,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855444417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:41,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:41,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:04:41,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365595076] [2021-08-21 18:04:41,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:04:41,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:04:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:04:41,690 INFO L87 Difference]: Start difference. First operand 998 states and 2879 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:43,323 INFO L93 Difference]: Finished difference Result 1168 states and 3376 transitions. [2021-08-21 18:04:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:04:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:43,325 INFO L225 Difference]: With dead ends: 1168 [2021-08-21 18:04:43,325 INFO L226 Difference]: Without dead ends: 1153 [2021-08-21 18:04:43,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1489.2ms TimeCoverageRelationStatistics Valid=309, Invalid=2241, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:04:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-08-21 18:04:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1011. [2021-08-21 18:04:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 2.897029702970297) internal successors, (2926), 1010 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2926 transitions. [2021-08-21 18:04:43,337 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2926 transitions. Word has length 33 [2021-08-21 18:04:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:43,338 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 2926 transitions. [2021-08-21 18:04:43,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:43,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2926 transitions. [2021-08-21 18:04:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:43,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:43,339 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:43,370 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 18:04:43,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:43,539 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash -216341833, now seen corresponding path program 8 times [2021-08-21 18:04:43,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:43,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077666962] [2021-08-21 18:04:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:43,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:43,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:43,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077666962] [2021-08-21 18:04:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077666962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:43,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657890051] [2021-08-21 18:04:43,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:04:43,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:43,817 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 18:04:43,818 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 18:04:48,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:04:48,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:48,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:48,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:48,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:04:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:49,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657890051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:49,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:49,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:04:49,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657724578] [2021-08-21 18:04:49,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:04:49,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:04:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:04:49,334 INFO L87 Difference]: Start difference. First operand 1011 states and 2926 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:51,136 INFO L93 Difference]: Finished difference Result 1080 states and 3108 transitions. [2021-08-21 18:04:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:04:51,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:51,138 INFO L225 Difference]: With dead ends: 1080 [2021-08-21 18:04:51,138 INFO L226 Difference]: Without dead ends: 1065 [2021-08-21 18:04:51,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 1693.0ms TimeCoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:04:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-08-21 18:04:51,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 1015. [2021-08-21 18:04:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1015 states, 1014 states have (on average 2.899408284023669) internal successors, (2940), 1014 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 2940 transitions. [2021-08-21 18:04:51,149 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 2940 transitions. Word has length 33 [2021-08-21 18:04:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:51,149 INFO L470 AbstractCegarLoop]: Abstraction has 1015 states and 2940 transitions. [2021-08-21 18:04:51,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:51,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 2940 transitions. [2021-08-21 18:04:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:51,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:51,151 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:51,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:04:51,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:51,351 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash -420188941, now seen corresponding path program 9 times [2021-08-21 18:04:51,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:51,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038991596] [2021-08-21 18:04:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:51,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:51,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038991596] [2021-08-21 18:04:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038991596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:51,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058788168] [2021-08-21 18:04:51,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:04:51,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:51,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:51,630 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 18:04:51,630 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 18:04:56,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:04:56,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:04:56,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:04:56,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:04:56,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:04:56,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-21 18:04:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:57,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058788168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:57,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:04:57,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:04:57,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637431955] [2021-08-21 18:04:57,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:04:57,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:04:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:04:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:04:57,244 INFO L87 Difference]: Start difference. First operand 1015 states and 2940 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:04:58,779 INFO L93 Difference]: Finished difference Result 1070 states and 3074 transitions. [2021-08-21 18:04:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:04:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:04:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:04:58,782 INFO L225 Difference]: With dead ends: 1070 [2021-08-21 18:04:58,782 INFO L226 Difference]: Without dead ends: 1055 [2021-08-21 18:04:58,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1543.5ms TimeCoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:04:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-08-21 18:04:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-08-21 18:04:58,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.9005905511811023) internal successors, (2947), 1016 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 18:04:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2947 transitions. [2021-08-21 18:04:58,793 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2947 transitions. Word has length 33 [2021-08-21 18:04:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:04:58,793 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 2947 transitions. [2021-08-21 18:04:58,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:04:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2947 transitions. [2021-08-21 18:04:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:04:58,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:04:58,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:04:58,828 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 18:04:59,008 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,SelfDestructingSolverStorable98 [2021-08-21 18:04:59,009 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:04:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:04:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1440336473, now seen corresponding path program 10 times [2021-08-21 18:04:59,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:04:59,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236505226] [2021-08-21 18:04:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:04:59,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:04:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:04:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:04:59,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:04:59,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236505226] [2021-08-21 18:04:59,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236505226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:04:59,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117928305] [2021-08-21 18:04:59,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:04:59,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:04:59,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:04:59,265 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 18:04:59,265 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 18:05:04,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:05:04,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:04,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:04,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:04,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-21 18:05:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:04,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117928305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:04,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:04,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:05:04,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189541271] [2021-08-21 18:05:04,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:05:04,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:04,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:05:04,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:05:04,520 INFO L87 Difference]: Start difference. First operand 1017 states and 2947 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:05,568 INFO L93 Difference]: Finished difference Result 1179 states and 3320 transitions. [2021-08-21 18:05:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:05:05,568 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:05,570 INFO L225 Difference]: With dead ends: 1179 [2021-08-21 18:05:05,570 INFO L226 Difference]: Without dead ends: 1164 [2021-08-21 18:05:05,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 914.1ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:05:05,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-08-21 18:05:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1017. [2021-08-21 18:05:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.9005905511811023) internal successors, (2947), 1016 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 18:05:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2947 transitions. [2021-08-21 18:05:05,582 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2947 transitions. Word has length 33 [2021-08-21 18:05:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:05,582 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 2947 transitions. [2021-08-21 18:05:05,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2947 transitions. [2021-08-21 18:05:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:05,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:05,584 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:05,614 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 18:05:05,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:05,784 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash 838338777, now seen corresponding path program 11 times [2021-08-21 18:05:05,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:05,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555908541] [2021-08-21 18:05:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:05,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:06,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:06,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:06,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555908541] [2021-08-21 18:05:06,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555908541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:06,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905381140] [2021-08-21 18:05:06,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:05:06,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:06,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:06,096 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 18:05:06,097 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 18:05:10,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:05:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:11,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-21 18:05:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:11,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905381140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:11,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:11,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:05:11,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913517213] [2021-08-21 18:05:11,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:05:11,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:05:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:05:11,402 INFO L87 Difference]: Start difference. First operand 1017 states and 2947 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:12,459 INFO L93 Difference]: Finished difference Result 1195 states and 3370 transitions. [2021-08-21 18:05:12,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:05:12,459 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:12,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:12,461 INFO L225 Difference]: With dead ends: 1195 [2021-08-21 18:05:12,462 INFO L226 Difference]: Without dead ends: 1180 [2021-08-21 18:05:12,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 918.9ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:05:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-08-21 18:05:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1021. [2021-08-21 18:05:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.903921568627451) internal successors, (2962), 1020 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2962 transitions. [2021-08-21 18:05:12,473 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2962 transitions. Word has length 33 [2021-08-21 18:05:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:12,473 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2962 transitions. [2021-08-21 18:05:12,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2962 transitions. [2021-08-21 18:05:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:12,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:12,474 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:12,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 18:05:12,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:12,675 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1596103105, now seen corresponding path program 12 times [2021-08-21 18:05:12,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:12,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220450518] [2021-08-21 18:05:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:12,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:12,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:12,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220450518] [2021-08-21 18:05:12,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220450518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:12,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186135817] [2021-08-21 18:05:12,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:05:12,952 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:12,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:12,961 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 18:05:12,977 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 18:05:17,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:05:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:18,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:18,173 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 18:05:18,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 49 [2021-08-21 18:05:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:18,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186135817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:18,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:18,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:05:18,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825529938] [2021-08-21 18:05:18,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:05:18,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:05:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:05:18,559 INFO L87 Difference]: Start difference. First operand 1021 states and 2962 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:19,918 INFO L93 Difference]: Finished difference Result 1152 states and 3323 transitions. [2021-08-21 18:05:19,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:05:19,918 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:19,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:19,920 INFO L225 Difference]: With dead ends: 1152 [2021-08-21 18:05:19,920 INFO L226 Difference]: Without dead ends: 1137 [2021-08-21 18:05:19,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1300.2ms TimeCoverageRelationStatistics Valid=263, Invalid=2089, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:05:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-08-21 18:05:19,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1019. [2021-08-21 18:05:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 1018 states have (on average 2.9027504911591357) internal successors, (2955), 1018 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 2955 transitions. [2021-08-21 18:05:19,932 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 2955 transitions. Word has length 33 [2021-08-21 18:05:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:19,932 INFO L470 AbstractCegarLoop]: Abstraction has 1019 states and 2955 transitions. [2021-08-21 18:05:19,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 2955 transitions. [2021-08-21 18:05:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:19,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:19,945 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:19,976 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 18:05:20,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 18:05:20,146 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:20,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2003797321, now seen corresponding path program 13 times [2021-08-21 18:05:20,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:20,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575097462] [2021-08-21 18:05:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:20,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575097462] [2021-08-21 18:05:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575097462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141054506] [2021-08-21 18:05:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:05:20,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:20,404 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 18:05:20,404 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 18:05:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:25,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:05:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141054506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:25,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:25,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:05:25,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557908497] [2021-08-21 18:05:25,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:05:25,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:25,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:05:25,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:05:25,779 INFO L87 Difference]: Start difference. First operand 1019 states and 2955 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:26,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:26,883 INFO L93 Difference]: Finished difference Result 1206 states and 3407 transitions. [2021-08-21 18:05:26,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:05:26,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:26,885 INFO L225 Difference]: With dead ends: 1206 [2021-08-21 18:05:26,885 INFO L226 Difference]: Without dead ends: 1191 [2021-08-21 18:05:26,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1006.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:05:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-21 18:05:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1021. [2021-08-21 18:05:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.9058823529411764) internal successors, (2964), 1020 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2964 transitions. [2021-08-21 18:05:26,897 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2964 transitions. Word has length 33 [2021-08-21 18:05:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:26,897 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2964 transitions. [2021-08-21 18:05:26,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2964 transitions. [2021-08-21 18:05:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:26,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:26,898 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:26,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 18:05:27,098 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,SelfDestructingSolverStorable102 [2021-08-21 18:05:27,099 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1698750039, now seen corresponding path program 4 times [2021-08-21 18:05:27,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:27,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879153990] [2021-08-21 18:05:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:27,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:27,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:27,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879153990] [2021-08-21 18:05:27,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879153990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:27,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524390585] [2021-08-21 18:05:27,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:05:27,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:27,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:27,353 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 18:05:27,354 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 18:05:32,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:05:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:32,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:05:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:32,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524390585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:32,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:32,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:05:32,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288597814] [2021-08-21 18:05:32,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:05:32,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:05:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:05:32,812 INFO L87 Difference]: Start difference. First operand 1021 states and 2964 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:34,095 INFO L93 Difference]: Finished difference Result 1209 states and 3411 transitions. [2021-08-21 18:05:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:05:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:34,097 INFO L225 Difference]: With dead ends: 1209 [2021-08-21 18:05:34,097 INFO L226 Difference]: Without dead ends: 1194 [2021-08-21 18:05:34,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1180.5ms TimeCoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:05:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-21 18:05:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1022. [2021-08-21 18:05:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.9020568070519097) internal successors, (2963), 1021 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2963 transitions. [2021-08-21 18:05:34,110 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2963 transitions. Word has length 33 [2021-08-21 18:05:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:34,110 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 2963 transitions. [2021-08-21 18:05:34,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2963 transitions. [2021-08-21 18:05:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:34,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:34,111 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:34,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:05:34,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 18:05:34,325 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1923836089, now seen corresponding path program 13 times [2021-08-21 18:05:34,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:34,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046092554] [2021-08-21 18:05:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:34,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:34,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:34,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046092554] [2021-08-21 18:05:34,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046092554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:34,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044770688] [2021-08-21 18:05:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:05:34,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:34,598 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 18:05:34,598 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 18:05:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:05:39,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:05:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:40,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044770688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:40,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:40,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:05:40,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913962973] [2021-08-21 18:05:40,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:05:40,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:05:40,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:05:40,086 INFO L87 Difference]: Start difference. First operand 1022 states and 2963 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:42,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:42,097 INFO L93 Difference]: Finished difference Result 1322 states and 3782 transitions. [2021-08-21 18:05:42,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:05:42,097 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:42,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:42,099 INFO L225 Difference]: With dead ends: 1322 [2021-08-21 18:05:42,099 INFO L226 Difference]: Without dead ends: 1292 [2021-08-21 18:05:42,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1836.3ms TimeCoverageRelationStatistics Valid=519, Invalid=3263, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:05:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-08-21 18:05:42,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1046. [2021-08-21 18:05:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.911961722488038) internal successors, (3043), 1045 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3043 transitions. [2021-08-21 18:05:42,111 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3043 transitions. Word has length 33 [2021-08-21 18:05:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:42,112 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3043 transitions. [2021-08-21 18:05:42,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3043 transitions. [2021-08-21 18:05:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:42,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:42,113 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:42,143 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 18:05:42,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:42,314 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1331416153, now seen corresponding path program 14 times [2021-08-21 18:05:42,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:42,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119855115] [2021-08-21 18:05:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:42,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:42,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:42,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119855115] [2021-08-21 18:05:42,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119855115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:42,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936349162] [2021-08-21 18:05:42,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:05:42,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:42,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:42,616 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 18:05:42,617 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 18:05:47,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:05:47,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:47,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:47,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:05:47,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:05:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:48,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936349162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:48,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:48,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:05:48,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701959256] [2021-08-21 18:05:48,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:05:48,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:48,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:05:48,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:05:48,455 INFO L87 Difference]: Start difference. First operand 1046 states and 3043 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:50,503 INFO L93 Difference]: Finished difference Result 1193 states and 3442 transitions. [2021-08-21 18:05:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:05:50,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:50,506 INFO L225 Difference]: With dead ends: 1193 [2021-08-21 18:05:50,506 INFO L226 Difference]: Without dead ends: 1163 [2021-08-21 18:05:50,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1957.3ms TimeCoverageRelationStatistics Valid=385, Invalid=2585, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:05:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-08-21 18:05:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1051. [2021-08-21 18:05:50,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.9114285714285715) internal successors, (3057), 1050 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3057 transitions. [2021-08-21 18:05:50,519 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3057 transitions. Word has length 33 [2021-08-21 18:05:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 3057 transitions. [2021-08-21 18:05:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3057 transitions. [2021-08-21 18:05:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:50,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:50,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:50,560 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 18:05:50,728 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,SelfDestructingSolverStorable105 [2021-08-21 18:05:50,729 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:50,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:50,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1127569045, now seen corresponding path program 15 times [2021-08-21 18:05:50,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:50,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274470184] [2021-08-21 18:05:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:50,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:51,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:51,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274470184] [2021-08-21 18:05:51,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274470184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:51,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522103829] [2021-08-21 18:05:51,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:05:51,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:51,041 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 18:05:51,042 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 18:05:56,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:05:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:05:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:05:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:05:56,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:05:56,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-21 18:05:57,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:57,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522103829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:57,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:05:57,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:05:57,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331057004] [2021-08-21 18:05:57,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:05:57,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:05:57,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:05:57,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:05:57,037 INFO L87 Difference]: Start difference. First operand 1051 states and 3057 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:05:58,995 INFO L93 Difference]: Finished difference Result 1175 states and 3374 transitions. [2021-08-21 18:05:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:05:58,995 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:05:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:05:58,997 INFO L225 Difference]: With dead ends: 1175 [2021-08-21 18:05:58,997 INFO L226 Difference]: Without dead ends: 1145 [2021-08-21 18:05:58,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1792.8ms TimeCoverageRelationStatistics Valid=344, Invalid=2308, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:05:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-08-21 18:05:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1061. [2021-08-21 18:05:59,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.913207547169811) internal successors, (3088), 1060 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 3088 transitions. [2021-08-21 18:05:59,009 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 3088 transitions. Word has length 33 [2021-08-21 18:05:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:05:59,009 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 3088 transitions. [2021-08-21 18:05:59,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:05:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 3088 transitions. [2021-08-21 18:05:59,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:05:59,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:05:59,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:05:59,042 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 18:05:59,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-21 18:05:59,211 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:05:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:05:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1306872837, now seen corresponding path program 16 times [2021-08-21 18:05:59,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:05:59,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870330689] [2021-08-21 18:05:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:05:59,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:05:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:05:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:05:59,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:05:59,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870330689] [2021-08-21 18:05:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870330689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:05:59,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519012588] [2021-08-21 18:05:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:05:59,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:05:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:05:59,502 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 18:05:59,503 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 18:06:04,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:04,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:04,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:06:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:04,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:06:04,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-21 18:06:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:05,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519012588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:05,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:05,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:06:05,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795341308] [2021-08-21 18:06:05,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:06:05,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:05,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:06:05,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:06:05,137 INFO L87 Difference]: Start difference. First operand 1061 states and 3088 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:06,965 INFO L93 Difference]: Finished difference Result 1320 states and 3781 transitions. [2021-08-21 18:06:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:06:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:06,967 INFO L225 Difference]: With dead ends: 1320 [2021-08-21 18:06:06,967 INFO L226 Difference]: Without dead ends: 1290 [2021-08-21 18:06:06,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 1666.7ms TimeCoverageRelationStatistics Valid=499, Invalid=3161, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:06:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-08-21 18:06:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1063. [2021-08-21 18:06:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.914312617702448) internal successors, (3095), 1062 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:06,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3095 transitions. [2021-08-21 18:06:06,980 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3095 transitions. Word has length 33 [2021-08-21 18:06:06,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:06,980 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 3095 transitions. [2021-08-21 18:06:06,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:06,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3095 transitions. [2021-08-21 18:06:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:06,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:06,981 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:07,013 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 18:06:07,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:07,182 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:07,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:07,182 INFO L82 PathProgramCache]: Analyzing trace with hash 758224663, now seen corresponding path program 14 times [2021-08-21 18:06:07,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:07,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712302733] [2021-08-21 18:06:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:07,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:07,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:07,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712302733] [2021-08-21 18:06:07,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712302733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:07,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033604324] [2021-08-21 18:06:07,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:06:07,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:07,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:07,504 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 18:06:07,505 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 18:06:12,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:06:12,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:06:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:12,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:06:12,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:06:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:13,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033604324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:13,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:13,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:06:13,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402643586] [2021-08-21 18:06:13,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:06:13,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:13,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:06:13,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:06:13,629 INFO L87 Difference]: Start difference. First operand 1063 states and 3095 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:15,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:15,635 INFO L93 Difference]: Finished difference Result 1234 states and 3531 transitions. [2021-08-21 18:06:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:06:15,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:15,637 INFO L225 Difference]: With dead ends: 1234 [2021-08-21 18:06:15,637 INFO L226 Difference]: Without dead ends: 1204 [2021-08-21 18:06:15,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1992.3ms TimeCoverageRelationStatistics Valid=361, Invalid=2189, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:06:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-08-21 18:06:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1067. [2021-08-21 18:06:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.9146341463414633) internal successors, (3107), 1066 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3107 transitions. [2021-08-21 18:06:15,649 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3107 transitions. Word has length 33 [2021-08-21 18:06:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:15,649 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3107 transitions. [2021-08-21 18:06:15,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3107 transitions. [2021-08-21 18:06:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:15,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:15,651 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:15,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:06:15,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:15,851 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash 165804727, now seen corresponding path program 17 times [2021-08-21 18:06:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:15,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621177868] [2021-08-21 18:06:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:15,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:16,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:16,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621177868] [2021-08-21 18:06:16,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621177868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:16,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652162371] [2021-08-21 18:06:16,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:16,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:16,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:16,191 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 18:06:16,191 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 18:06:21,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:06:21,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:06:21,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:21,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 18:06:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:22,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652162371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:22,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:22,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-21 18:06:22,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747703142] [2021-08-21 18:06:22,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:06:22,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:06:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:06:22,017 INFO L87 Difference]: Start difference. First operand 1067 states and 3107 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:23,795 INFO L93 Difference]: Finished difference Result 1346 states and 3836 transitions. [2021-08-21 18:06:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:06:23,795 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:23,797 INFO L225 Difference]: With dead ends: 1346 [2021-08-21 18:06:23,798 INFO L226 Difference]: Without dead ends: 1316 [2021-08-21 18:06:23,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1518.1ms TimeCoverageRelationStatistics Valid=506, Invalid=2800, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:06:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-08-21 18:06:23,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1070. [2021-08-21 18:06:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.913938260056127) internal successors, (3115), 1069 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 3115 transitions. [2021-08-21 18:06:23,810 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 3115 transitions. Word has length 33 [2021-08-21 18:06:23,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:23,810 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 3115 transitions. [2021-08-21 18:06:23,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 3115 transitions. [2021-08-21 18:06:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:23,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:23,812 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:23,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 18:06:24,012 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,SelfDestructingSolverStorable109 [2021-08-21 18:06:24,012 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:24,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1836809927, now seen corresponding path program 15 times [2021-08-21 18:06:24,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:24,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943079302] [2021-08-21 18:06:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:24,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:24,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:24,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943079302] [2021-08-21 18:06:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943079302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:24,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201081728] [2021-08-21 18:06:24,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:06:24,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:24,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:24,289 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 18:06:24,290 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 18:06:29,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:06:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:29,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:06:29,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:29,911 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-08-21 18:06:29,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 70 [2021-08-21 18:06:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:30,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201081728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:30,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:30,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:06:30,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909261720] [2021-08-21 18:06:30,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:06:30,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:06:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:06:30,334 INFO L87 Difference]: Start difference. First operand 1070 states and 3115 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:31,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:31,685 INFO L93 Difference]: Finished difference Result 1252 states and 3596 transitions. [2021-08-21 18:06:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:06:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:31,687 INFO L225 Difference]: With dead ends: 1252 [2021-08-21 18:06:31,687 INFO L226 Difference]: Without dead ends: 1239 [2021-08-21 18:06:31,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1270.7ms TimeCoverageRelationStatistics Valid=334, Invalid=2528, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:06:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-08-21 18:06:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1079. [2021-08-21 18:06:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 2.9174397031539887) internal successors, (3145), 1078 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3145 transitions. [2021-08-21 18:06:31,700 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3145 transitions. Word has length 33 [2021-08-21 18:06:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:31,700 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 3145 transitions. [2021-08-21 18:06:31,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3145 transitions. [2021-08-21 18:06:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:31,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:31,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:31,734 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 18:06:31,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:31,902 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash -86069481, now seen corresponding path program 16 times [2021-08-21 18:06:31,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:31,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796409402] [2021-08-21 18:06:31,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:31,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:32,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:32,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796409402] [2021-08-21 18:06:32,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796409402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:32,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214845623] [2021-08-21 18:06:32,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:06:32,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:32,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:32,152 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 18:06:32,152 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 18:06:37,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:06:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:06:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:06:37,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:06:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:38,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214845623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:38,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:38,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:06:38,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221684337] [2021-08-21 18:06:38,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:06:38,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:06:38,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:06:38,038 INFO L87 Difference]: Start difference. First operand 1079 states and 3145 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:39,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:39,061 INFO L93 Difference]: Finished difference Result 1392 states and 3901 transitions. [2021-08-21 18:06:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:06:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:39,063 INFO L225 Difference]: With dead ends: 1392 [2021-08-21 18:06:39,063 INFO L226 Difference]: Without dead ends: 1366 [2021-08-21 18:06:39,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 886.8ms TimeCoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:06:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-08-21 18:06:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1093. [2021-08-21 18:06:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 2.922161172161172) internal successors, (3191), 1092 states have internal predecessors, (3191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 3191 transitions. [2021-08-21 18:06:39,077 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 3191 transitions. Word has length 33 [2021-08-21 18:06:39,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:39,077 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 3191 transitions. [2021-08-21 18:06:39,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 3191 transitions. [2021-08-21 18:06:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:39,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:39,078 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:39,112 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 18:06:39,296 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,SelfDestructingSolverStorable111 [2021-08-21 18:06:39,297 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1979579145, now seen corresponding path program 23 times [2021-08-21 18:06:39,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:39,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296847739] [2021-08-21 18:06:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:39,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:39,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:39,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296847739] [2021-08-21 18:06:39,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296847739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:39,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792827065] [2021-08-21 18:06:39,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:06:39,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:39,522 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 18:06:39,522 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 18:06:44,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:06:44,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:06:44,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:45,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:06:45,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:06:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:45,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792827065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:45,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:45,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:06:45,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413434087] [2021-08-21 18:06:45,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:06:45,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:06:45,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:06:45,439 INFO L87 Difference]: Start difference. First operand 1093 states and 3191 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:46,409 INFO L93 Difference]: Finished difference Result 1394 states and 3928 transitions. [2021-08-21 18:06:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:06:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:46,412 INFO L225 Difference]: With dead ends: 1394 [2021-08-21 18:06:46,412 INFO L226 Difference]: Without dead ends: 1368 [2021-08-21 18:06:46,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=368, Invalid=2182, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:06:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-08-21 18:06:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1105. [2021-08-21 18:06:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1104 states have (on average 2.9302536231884058) internal successors, (3235), 1104 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 3235 transitions. [2021-08-21 18:06:46,425 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 3235 transitions. Word has length 33 [2021-08-21 18:06:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:46,425 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 3235 transitions. [2021-08-21 18:06:46,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 3235 transitions. [2021-08-21 18:06:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:46,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:46,427 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:46,460 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 18:06:46,627 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,SelfDestructingSolverStorable112 [2021-08-21 18:06:46,627 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash 671010841, now seen corresponding path program 18 times [2021-08-21 18:06:46,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:46,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549335980] [2021-08-21 18:06:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:46,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:46,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:46,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549335980] [2021-08-21 18:06:46,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549335980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:46,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749768225] [2021-08-21 18:06:46,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:06:46,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:46,858 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 18:06:46,858 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 18:06:52,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:06:52,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:06:52,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:06:52,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:06:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:06:52,592 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 18:06:52,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 49 [2021-08-21 18:06:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:52,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749768225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:52,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:06:52,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:06:52,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889765383] [2021-08-21 18:06:52,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:06:52,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:06:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:06:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:06:52,990 INFO L87 Difference]: Start difference. First operand 1105 states and 3235 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:54,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:06:54,121 INFO L93 Difference]: Finished difference Result 1248 states and 3591 transitions. [2021-08-21 18:06:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:06:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:06:54,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:06:54,124 INFO L225 Difference]: With dead ends: 1248 [2021-08-21 18:06:54,124 INFO L226 Difference]: Without dead ends: 1235 [2021-08-21 18:06:54,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=290, Invalid=2160, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:06:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-08-21 18:06:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1114. [2021-08-21 18:06:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.930817610062893) internal successors, (3262), 1113 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 3262 transitions. [2021-08-21 18:06:54,136 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 3262 transitions. Word has length 33 [2021-08-21 18:06:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:06:54,136 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 3262 transitions. [2021-08-21 18:06:54,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:06:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 3262 transitions. [2021-08-21 18:06:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:06:54,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:06:54,137 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:06:54,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 18:06:54,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:54,338 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:06:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:06:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1829022391, now seen corresponding path program 19 times [2021-08-21 18:06:54,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:06:54,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897783087] [2021-08-21 18:06:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:06:54,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:06:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:06:54,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:06:54,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:06:54,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897783087] [2021-08-21 18:06:54,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897783087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:06:54,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95984244] [2021-08-21 18:06:54,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:06:54,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:06:54,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:06:54,549 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 18:06:54,549 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 18:07:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:00,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:07:00,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:07:00,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:00,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95984244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:00,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:00,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:07:00,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930075223] [2021-08-21 18:07:00,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:07:00,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:00,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:07:00,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:07:00,551 INFO L87 Difference]: Start difference. First operand 1114 states and 3262 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:01,521 INFO L93 Difference]: Finished difference Result 1420 states and 3995 transitions. [2021-08-21 18:07:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:07:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:01,524 INFO L225 Difference]: With dead ends: 1420 [2021-08-21 18:07:01,524 INFO L226 Difference]: Without dead ends: 1394 [2021-08-21 18:07:01,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=354, Invalid=2096, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:07:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2021-08-21 18:07:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1127. [2021-08-21 18:07:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.9369449378330375) internal successors, (3307), 1126 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:01,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3307 transitions. [2021-08-21 18:07:01,537 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3307 transitions. Word has length 33 [2021-08-21 18:07:01,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:01,537 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 3307 transitions. [2021-08-21 18:07:01,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3307 transitions. [2021-08-21 18:07:01,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:01,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:01,538 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:01,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 18:07:01,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-21 18:07:01,739 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash -64487273, now seen corresponding path program 37 times [2021-08-21 18:07:01,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:01,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478975308] [2021-08-21 18:07:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:01,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478975308] [2021-08-21 18:07:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478975308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:01,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526524372] [2021-08-21 18:07:01,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:01,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:01,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:01,977 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 18:07:01,978 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 18:07:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:07,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:07,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:07:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:08,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526524372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:08,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:08,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:07:08,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911727549] [2021-08-21 18:07:08,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:07:08,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:08,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:07:08,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:07:08,045 INFO L87 Difference]: Start difference. First operand 1127 states and 3307 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:09,017 INFO L93 Difference]: Finished difference Result 1417 states and 4009 transitions. [2021-08-21 18:07:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:07:09,017 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:09,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:09,019 INFO L225 Difference]: With dead ends: 1417 [2021-08-21 18:07:09,019 INFO L226 Difference]: Without dead ends: 1391 [2021-08-21 18:07:09,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:07:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-08-21 18:07:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1136. [2021-08-21 18:07:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.941850220264317) internal successors, (3339), 1135 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3339 transitions. [2021-08-21 18:07:09,032 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3339 transitions. Word has length 33 [2021-08-21 18:07:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 1136 states and 3339 transitions. [2021-08-21 18:07:09,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3339 transitions. [2021-08-21 18:07:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:09,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:09,034 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:09,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-21 18:07:09,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-21 18:07:09,234 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:09,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:09,234 INFO L82 PathProgramCache]: Analyzing trace with hash 166146775, now seen corresponding path program 38 times [2021-08-21 18:07:09,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:09,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432111332] [2021-08-21 18:07:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:09,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:09,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:09,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432111332] [2021-08-21 18:07:09,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432111332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:09,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606645562] [2021-08-21 18:07:09,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:07:09,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:09,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:09,621 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 18:07:09,621 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 18:07:15,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:07:15,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:15,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:15,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:07:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-21 18:07:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:15,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606645562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:15,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:15,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:07:15,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572765547] [2021-08-21 18:07:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:07:15,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:15,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:07:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:07:15,996 INFO L87 Difference]: Start difference. First operand 1136 states and 3339 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:17,735 INFO L93 Difference]: Finished difference Result 1298 states and 3770 transitions. [2021-08-21 18:07:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:07:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:17,737 INFO L225 Difference]: With dead ends: 1298 [2021-08-21 18:07:17,737 INFO L226 Difference]: Without dead ends: 1268 [2021-08-21 18:07:17,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1622.3ms TimeCoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:07:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-08-21 18:07:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1148. [2021-08-21 18:07:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 2.948561464690497) internal successors, (3382), 1147 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3382 transitions. [2021-08-21 18:07:17,750 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3382 transitions. Word has length 33 [2021-08-21 18:07:17,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:17,751 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3382 transitions. [2021-08-21 18:07:17,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3382 transitions. [2021-08-21 18:07:17,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:17,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:17,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:17,787 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 18:07:17,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:17,954 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1110295175, now seen corresponding path program 39 times [2021-08-21 18:07:17,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:17,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861657666] [2021-08-21 18:07:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:17,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:18,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:18,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861657666] [2021-08-21 18:07:18,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861657666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:18,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530305960] [2021-08-21 18:07:18,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:07:18,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:18,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:18,188 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 18:07:18,188 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 18:07:23,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:07:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:24,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:07:24,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-08-21 18:07:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:24,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530305960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:24,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:24,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:07:24,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988799741] [2021-08-21 18:07:24,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:07:24,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:24,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:07:24,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:07:24,613 INFO L87 Difference]: Start difference. First operand 1148 states and 3382 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:25,803 INFO L93 Difference]: Finished difference Result 1280 states and 3703 transitions. [2021-08-21 18:07:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:07:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:25,806 INFO L225 Difference]: With dead ends: 1280 [2021-08-21 18:07:25,806 INFO L226 Difference]: Without dead ends: 1267 [2021-08-21 18:07:25,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1127.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:07:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-08-21 18:07:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1150. [2021-08-21 18:07:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 2.946910356832028) internal successors, (3386), 1149 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3386 transitions. [2021-08-21 18:07:25,819 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3386 transitions. Word has length 33 [2021-08-21 18:07:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:25,819 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3386 transitions. [2021-08-21 18:07:25,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3386 transitions. [2021-08-21 18:07:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:25,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:25,820 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:25,854 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 18:07:26,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:26,021 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:26,021 INFO L82 PathProgramCache]: Analyzing trace with hash 507428697, now seen corresponding path program 24 times [2021-08-21 18:07:26,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:26,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453721506] [2021-08-21 18:07:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:26,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:26,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:26,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453721506] [2021-08-21 18:07:26,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453721506] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:26,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090140557] [2021-08-21 18:07:26,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:07:26,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:26,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:26,259 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 18:07:26,260 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 18:07:31,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:07:31,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:31,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:07:32,273 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 18:07:32,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2021-08-21 18:07:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:32,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090140557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:32,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:32,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-21 18:07:32,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812892200] [2021-08-21 18:07:32,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:07:32,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:07:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:07:32,647 INFO L87 Difference]: Start difference. First operand 1150 states and 3386 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:33,998 INFO L93 Difference]: Finished difference Result 1327 states and 3857 transitions. [2021-08-21 18:07:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:07:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:34,001 INFO L225 Difference]: With dead ends: 1327 [2021-08-21 18:07:34,001 INFO L226 Difference]: Without dead ends: 1312 [2021-08-21 18:07:34,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1268.8ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:07:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-08-21 18:07:34,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 1158. [2021-08-21 18:07:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.9481417458945547) internal successors, (3411), 1157 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3411 transitions. [2021-08-21 18:07:34,014 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3411 transitions. Word has length 33 [2021-08-21 18:07:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:34,014 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 3411 transitions. [2021-08-21 18:07:34,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3411 transitions. [2021-08-21 18:07:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:34,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:34,016 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:34,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-21 18:07:34,216 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,SelfDestructingSolverStorable118 [2021-08-21 18:07:34,216 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:34,216 INFO L82 PathProgramCache]: Analyzing trace with hash 829694587, now seen corresponding path program 25 times [2021-08-21 18:07:34,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:34,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698743884] [2021-08-21 18:07:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:34,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:34,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:34,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698743884] [2021-08-21 18:07:34,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698743884] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:34,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662644326] [2021-08-21 18:07:34,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:07:34,499 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:34,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:34,499 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 18:07:34,500 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 18:07:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:40,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:40,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:40,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:07:40,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:40,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662644326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:40,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:40,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:07:40,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877699745] [2021-08-21 18:07:40,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:07:40,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:07:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:07:40,760 INFO L87 Difference]: Start difference. First operand 1158 states and 3411 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:42,316 INFO L93 Difference]: Finished difference Result 1378 states and 3981 transitions. [2021-08-21 18:07:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:07:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:42,318 INFO L225 Difference]: With dead ends: 1378 [2021-08-21 18:07:42,318 INFO L226 Difference]: Without dead ends: 1348 [2021-08-21 18:07:42,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1447.6ms TimeCoverageRelationStatistics Valid=444, Invalid=2312, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:07:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-08-21 18:07:42,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1158. [2021-08-21 18:07:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 2.9464131374243734) internal successors, (3409), 1157 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3409 transitions. [2021-08-21 18:07:42,331 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3409 transitions. Word has length 33 [2021-08-21 18:07:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:42,331 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 3409 transitions. [2021-08-21 18:07:42,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3409 transitions. [2021-08-21 18:07:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:42,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:42,332 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:42,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-21 18:07:42,533 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,SelfDestructingSolverStorable119 [2021-08-21 18:07:42,534 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:42,534 INFO L82 PathProgramCache]: Analyzing trace with hash -390910605, now seen corresponding path program 20 times [2021-08-21 18:07:42,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:42,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163281567] [2021-08-21 18:07:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:42,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:42,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:42,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163281567] [2021-08-21 18:07:42,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163281567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:42,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575475613] [2021-08-21 18:07:42,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:07:42,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:42,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:42,780 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 18:07:42,781 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 18:07:48,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:07:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:48,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:07:48,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:07:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:49,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575475613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:49,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:49,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:07:49,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424962617] [2021-08-21 18:07:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:07:49,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:49,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:07:49,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:07:49,530 INFO L87 Difference]: Start difference. First operand 1158 states and 3409 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:50,536 INFO L93 Difference]: Finished difference Result 1228 states and 3596 transitions. [2021-08-21 18:07:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:07:50,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:50,539 INFO L225 Difference]: With dead ends: 1228 [2021-08-21 18:07:50,539 INFO L226 Difference]: Without dead ends: 1215 [2021-08-21 18:07:50,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1050.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:07:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-08-21 18:07:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1164. [2021-08-21 18:07:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.945829750644884) internal successors, (3426), 1163 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3426 transitions. [2021-08-21 18:07:50,552 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3426 transitions. Word has length 33 [2021-08-21 18:07:50,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:50,552 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 3426 transitions. [2021-08-21 18:07:50,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:50,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3426 transitions. [2021-08-21 18:07:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:50,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:50,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:50,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 18:07:50,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:50,754 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1469614809, now seen corresponding path program 21 times [2021-08-21 18:07:50,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:50,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600792137] [2021-08-21 18:07:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:50,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:50,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:50,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600792137] [2021-08-21 18:07:50,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600792137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:50,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456874947] [2021-08-21 18:07:50,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:07:50,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:50,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:50,985 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 18:07:50,985 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 18:07:56,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:07:56,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:07:56,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:07:56,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:07:57,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:07:57,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-08-21 18:07:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:57,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456874947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:57,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:07:57,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:07:57,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895207418] [2021-08-21 18:07:57,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:07:57,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:07:57,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:07:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:07:57,761 INFO L87 Difference]: Start difference. First operand 1164 states and 3426 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:07:58,669 INFO L93 Difference]: Finished difference Result 1221 states and 3569 transitions. [2021-08-21 18:07:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:07:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:07:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:07:58,672 INFO L225 Difference]: With dead ends: 1221 [2021-08-21 18:07:58,672 INFO L226 Difference]: Without dead ends: 1208 [2021-08-21 18:07:58,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:07:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-08-21 18:07:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1164. [2021-08-21 18:07:58,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 2.945829750644884) internal successors, (3426), 1163 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:58,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3426 transitions. [2021-08-21 18:07:58,685 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3426 transitions. Word has length 33 [2021-08-21 18:07:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:07:58,685 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 3426 transitions. [2021-08-21 18:07:58,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:07:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3426 transitions. [2021-08-21 18:07:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:07:58,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:07:58,686 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:07:58,721 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 18:07:58,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:58,887 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:07:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:07:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1952531627, now seen corresponding path program 22 times [2021-08-21 18:07:58,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:07:58,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102005592] [2021-08-21 18:07:58,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:07:58,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:07:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:07:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:07:59,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:07:59,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102005592] [2021-08-21 18:07:59,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102005592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:07:59,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282975972] [2021-08-21 18:07:59,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:07:59,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:07:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:07:59,114 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 18:07:59,114 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 18:08:05,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:08:05,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:05,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:08:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:05,395 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 18:08:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 56 [2021-08-21 18:08:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:05,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282975972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:05,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:05,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:08:05,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735496975] [2021-08-21 18:08:05,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:08:05,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:05,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:08:05,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:08:05,583 INFO L87 Difference]: Start difference. First operand 1164 states and 3426 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:06,559 INFO L93 Difference]: Finished difference Result 1429 states and 4090 transitions. [2021-08-21 18:08:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:08:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:06,561 INFO L225 Difference]: With dead ends: 1429 [2021-08-21 18:08:06,562 INFO L226 Difference]: Without dead ends: 1403 [2021-08-21 18:08:06,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 903.2ms TimeCoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:08:06,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-08-21 18:08:06,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1187. [2021-08-21 18:08:06,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.9569983136593594) internal successors, (3507), 1186 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3507 transitions. [2021-08-21 18:08:06,575 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3507 transitions. Word has length 33 [2021-08-21 18:08:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:06,575 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 3507 transitions. [2021-08-21 18:08:06,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3507 transitions. [2021-08-21 18:08:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:06,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:06,577 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:06,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-21 18:08:06,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:06,781 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:06,781 INFO L82 PathProgramCache]: Analyzing trace with hash -794520077, now seen corresponding path program 23 times [2021-08-21 18:08:06,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:06,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991802293] [2021-08-21 18:08:06,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:06,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:07,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991802293] [2021-08-21 18:08:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991802293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700462681] [2021-08-21 18:08:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:08:07,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:07,006 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 18:08:07,007 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 18:08:12,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:08:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:08:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:13,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:08:13,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:08:13,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 39 [2021-08-21 18:08:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:13,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700462681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:13,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:13,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-21 18:08:13,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004707001] [2021-08-21 18:08:13,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:08:13,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:08:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:08:13,735 INFO L87 Difference]: Start difference. First operand 1187 states and 3507 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:14,975 INFO L93 Difference]: Finished difference Result 1416 states and 4042 transitions. [2021-08-21 18:08:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:08:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:14,978 INFO L225 Difference]: With dead ends: 1416 [2021-08-21 18:08:14,978 INFO L226 Difference]: Without dead ends: 1390 [2021-08-21 18:08:14,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1092.4ms TimeCoverageRelationStatistics Valid=355, Invalid=2615, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:08:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-08-21 18:08:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1190. [2021-08-21 18:08:14,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 2.9587888982338097) internal successors, (3518), 1189 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3518 transitions. [2021-08-21 18:08:14,991 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3518 transitions. Word has length 33 [2021-08-21 18:08:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:14,991 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 3518 transitions. [2021-08-21 18:08:14,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3518 transitions. [2021-08-21 18:08:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:14,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:14,992 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:15,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2021-08-21 18:08:15,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-21 18:08:15,193 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1606937555, now seen corresponding path program 40 times [2021-08-21 18:08:15,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:15,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381702794] [2021-08-21 18:08:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:15,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:15,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:15,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381702794] [2021-08-21 18:08:15,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381702794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:15,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922822816] [2021-08-21 18:08:15,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:08:15,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:15,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:15,417 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 18:08:15,458 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 18:08:21,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:08:21,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:08:21,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:08:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:22,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922822816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:22,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:22,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:08:22,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837940269] [2021-08-21 18:08:22,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:08:22,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:08:22,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:08:22,003 INFO L87 Difference]: Start difference. First operand 1190 states and 3518 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:23,122 INFO L93 Difference]: Finished difference Result 1452 states and 4152 transitions. [2021-08-21 18:08:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:08:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:23,125 INFO L225 Difference]: With dead ends: 1452 [2021-08-21 18:08:23,125 INFO L226 Difference]: Without dead ends: 1426 [2021-08-21 18:08:23,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 881.7ms TimeCoverageRelationStatistics Valid=309, Invalid=2043, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:08:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-08-21 18:08:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-08-21 18:08:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.962248322147651) internal successors, (3531), 1192 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3531 transitions. [2021-08-21 18:08:23,139 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3531 transitions. Word has length 33 [2021-08-21 18:08:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:23,139 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 3531 transitions. [2021-08-21 18:08:23,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3531 transitions. [2021-08-21 18:08:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:23,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:23,140 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:23,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-08-21 18:08:23,357 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,SelfDestructingSolverStorable124 [2021-08-21 18:08:23,358 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:23,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:23,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1286732805, now seen corresponding path program 24 times [2021-08-21 18:08:23,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:23,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225048571] [2021-08-21 18:08:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:23,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:23,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:23,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225048571] [2021-08-21 18:08:23,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225048571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:23,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172065633] [2021-08-21 18:08:23,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:08:23,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:23,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:23,594 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 18:08:23,596 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 18:08:29,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:08:29,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:08:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:08:29,969 INFO L354 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2021-08-21 18:08:29,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 53 [2021-08-21 18:08:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172065633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:30,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:30,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:08:30,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54143271] [2021-08-21 18:08:30,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:08:30,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:30,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:08:30,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:08:30,391 INFO L87 Difference]: Start difference. First operand 1193 states and 3531 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:31,476 INFO L93 Difference]: Finished difference Result 1263 states and 3698 transitions. [2021-08-21 18:08:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:08:31,476 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:31,478 INFO L225 Difference]: With dead ends: 1263 [2021-08-21 18:08:31,478 INFO L226 Difference]: Without dead ends: 1250 [2021-08-21 18:08:31,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 986.7ms TimeCoverageRelationStatistics Valid=249, Invalid=2007, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:08:31,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-08-21 18:08:31,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1195. [2021-08-21 18:08:31,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.963149078726968) internal successors, (3538), 1194 states have internal predecessors, (3538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3538 transitions. [2021-08-21 18:08:31,491 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3538 transitions. Word has length 33 [2021-08-21 18:08:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:31,492 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 3538 transitions. [2021-08-21 18:08:31,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3538 transitions. [2021-08-21 18:08:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:31,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:31,493 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:31,528 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-21 18:08:31,694 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,SelfDestructingSolverStorable125 [2021-08-21 18:08:31,695 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:31,695 INFO L82 PathProgramCache]: Analyzing trace with hash 464007641, now seen corresponding path program 25 times [2021-08-21 18:08:31,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:31,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943984706] [2021-08-21 18:08:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:31,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:31,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:31,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943984706] [2021-08-21 18:08:31,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943984706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:31,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115064246] [2021-08-21 18:08:31,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:08:31,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:31,924 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 18:08:31,925 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 18:08:38,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:38,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:08:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:38,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 18:08:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:38,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115064246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:38,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:38,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:08:38,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375742333] [2021-08-21 18:08:38,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:08:38,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:08:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:08:38,603 INFO L87 Difference]: Start difference. First operand 1195 states and 3538 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:39,716 INFO L93 Difference]: Finished difference Result 1486 states and 4231 transitions. [2021-08-21 18:08:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:08:39,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:39,719 INFO L225 Difference]: With dead ends: 1486 [2021-08-21 18:08:39,719 INFO L226 Difference]: Without dead ends: 1460 [2021-08-21 18:08:39,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 920.6ms TimeCoverageRelationStatistics Valid=297, Invalid=2153, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:08:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-21 18:08:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1197. [2021-08-21 18:08:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.9657190635451505) internal successors, (3547), 1196 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3547 transitions. [2021-08-21 18:08:39,734 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3547 transitions. Word has length 33 [2021-08-21 18:08:39,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:39,734 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3547 transitions. [2021-08-21 18:08:39,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3547 transitions. [2021-08-21 18:08:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:39,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:39,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:39,772 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 18:08:39,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:39,953 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1429502023, now seen corresponding path program 41 times [2021-08-21 18:08:39,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:39,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948449989] [2021-08-21 18:08:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:39,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:40,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:40,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948449989] [2021-08-21 18:08:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948449989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:40,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342407562] [2021-08-21 18:08:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:08:40,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:40,175 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 18:08:40,178 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 18:08:46,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:08:46,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:46,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:08:46,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:46,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:08:46,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-08-21 18:08:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:46,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342407562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:46,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:46,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-21 18:08:46,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528459619] [2021-08-21 18:08:46,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:08:46,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:46,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:08:46,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:08:46,873 INFO L87 Difference]: Start difference. First operand 1197 states and 3547 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:48,040 INFO L93 Difference]: Finished difference Result 1470 states and 4205 transitions. [2021-08-21 18:08:48,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:08:48,040 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:48,043 INFO L225 Difference]: With dead ends: 1470 [2021-08-21 18:08:48,043 INFO L226 Difference]: Without dead ends: 1444 [2021-08-21 18:08:48,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=291, Invalid=2061, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:08:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-08-21 18:08:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1194. [2021-08-21 18:08:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.9631181894383904) internal successors, (3535), 1193 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3535 transitions. [2021-08-21 18:08:48,057 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3535 transitions. Word has length 33 [2021-08-21 18:08:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:48,057 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 3535 transitions. [2021-08-21 18:08:48,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:48,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3535 transitions. [2021-08-21 18:08:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:48,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:48,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:48,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-21 18:08:48,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:48,261 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1010109883, now seen corresponding path program 26 times [2021-08-21 18:08:48,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:48,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660621311] [2021-08-21 18:08:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:48,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:48,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:48,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660621311] [2021-08-21 18:08:48,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660621311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:48,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536417093] [2021-08-21 18:08:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:08:48,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:48,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:48,533 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 18:08:48,539 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 18:08:54,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:08:54,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:08:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:08:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:08:55,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:08:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-21 18:08:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536417093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:55,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:08:55,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:08:55,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218173404] [2021-08-21 18:08:55,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:08:55,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:08:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:08:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:08:55,657 INFO L87 Difference]: Start difference. First operand 1194 states and 3535 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:08:57,453 INFO L93 Difference]: Finished difference Result 1348 states and 3947 transitions. [2021-08-21 18:08:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:08:57,453 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:08:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:08:57,456 INFO L225 Difference]: With dead ends: 1348 [2021-08-21 18:08:57,456 INFO L226 Difference]: Without dead ends: 1318 [2021-08-21 18:08:57,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1679.8ms TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:08:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-08-21 18:08:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1208. [2021-08-21 18:08:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 2.9652029826014914) internal successors, (3579), 1207 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 3579 transitions. [2021-08-21 18:08:57,470 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 3579 transitions. Word has length 33 [2021-08-21 18:08:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:08:57,470 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 3579 transitions. [2021-08-21 18:08:57,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:08:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 3579 transitions. [2021-08-21 18:08:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:08:57,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:08:57,472 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:08:57,512 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 18:08:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-21 18:08:57,673 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:08:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:08:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1424331999, now seen corresponding path program 27 times [2021-08-21 18:08:57,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:08:57,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964410108] [2021-08-21 18:08:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:08:57,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:08:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:08:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:08:57,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:08:57,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964410108] [2021-08-21 18:08:57,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964410108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:08:57,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534162000] [2021-08-21 18:08:57,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:08:57,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:08:57,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:08:57,950 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 18:08:57,950 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 18:09:04,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:09:04,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:04,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:09:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:04,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:09:04,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-08-21 18:09:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:05,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534162000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:05,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:05,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:09:05,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447286548] [2021-08-21 18:09:05,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:09:05,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:05,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:09:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:09:05,143 INFO L87 Difference]: Start difference. First operand 1208 states and 3579 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:06,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:06,998 INFO L93 Difference]: Finished difference Result 1339 states and 3913 transitions. [2021-08-21 18:09:06,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:09:06,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:09:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:07,001 INFO L225 Difference]: With dead ends: 1339 [2021-08-21 18:09:07,001 INFO L226 Difference]: Without dead ends: 1309 [2021-08-21 18:09:07,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1712.5ms TimeCoverageRelationStatistics Valid=359, Invalid=2397, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:09:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2021-08-21 18:09:07,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1206. [2021-08-21 18:09:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.9643153526970956) internal successors, (3572), 1205 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:07,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 3572 transitions. [2021-08-21 18:09:07,015 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 3572 transitions. Word has length 33 [2021-08-21 18:09:07,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:07,015 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 3572 transitions. [2021-08-21 18:09:07,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 3572 transitions. [2021-08-21 18:09:07,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:09:07,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:07,016 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:07,052 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 18:09:07,217 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,SelfDestructingSolverStorable129 [2021-08-21 18:09:07,217 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:09:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1832026215, now seen corresponding path program 28 times [2021-08-21 18:09:07,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:07,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481664426] [2021-08-21 18:09:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:07,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:07,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:07,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481664426] [2021-08-21 18:09:07,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481664426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:07,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734380726] [2021-08-21 18:09:07,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:09:07,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:07,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:07,579 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 18:09:07,579 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 18:09:13,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:09:13,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:13,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:09:13,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:14,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:09:14,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:09:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:14,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734380726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:14,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:14,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:09:14,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953866498] [2021-08-21 18:09:14,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:09:14,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:09:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:09:14,392 INFO L87 Difference]: Start difference. First operand 1206 states and 3572 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:16,200 INFO L93 Difference]: Finished difference Result 1528 states and 4452 transitions. [2021-08-21 18:09:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:09:16,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:09:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:16,203 INFO L225 Difference]: With dead ends: 1528 [2021-08-21 18:09:16,203 INFO L226 Difference]: Without dead ends: 1498 [2021-08-21 18:09:16,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1607.7ms TimeCoverageRelationStatistics Valid=515, Invalid=3267, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:09:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-08-21 18:09:16,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1220. [2021-08-21 18:09:16,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 2.969647251845775) internal successors, (3620), 1219 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3620 transitions. [2021-08-21 18:09:16,218 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3620 transitions. Word has length 33 [2021-08-21 18:09:16,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:16,218 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 3620 transitions. [2021-08-21 18:09:16,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:16,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3620 transitions. [2021-08-21 18:09:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:09:16,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:16,220 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:16,257 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 18:09:16,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:16,433 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:09:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1870521145, now seen corresponding path program 5 times [2021-08-21 18:09:16,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:16,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646185822] [2021-08-21 18:09:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:16,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:16,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:16,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646185822] [2021-08-21 18:09:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646185822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:16,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579608812] [2021-08-21 18:09:16,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:09:16,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:16,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:16,710 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 18:09:16,710 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 18:09:23,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:09:23,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:09:23,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:09:23,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:09:23,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:09:23,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-08-21 18:09:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:23,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579608812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:23,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:23,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-21 18:09:23,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45351890] [2021-08-21 18:09:23,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:09:23,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:09:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:09:23,713 INFO L87 Difference]: Start difference. First operand 1220 states and 3620 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:25,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:25,617 INFO L93 Difference]: Finished difference Result 1543 states and 4489 transitions. [2021-08-21 18:09:25,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:09:25,617 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:09:25,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:25,620 INFO L225 Difference]: With dead ends: 1543 [2021-08-21 18:09:25,620 INFO L226 Difference]: Without dead ends: 1513 [2021-08-21 18:09:25,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1702.9ms TimeCoverageRelationStatistics Valid=546, Invalid=3236, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:09:25,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-08-21 18:09:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1223. [2021-08-21 18:09:25,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1222 states have (on average 2.963175122749591) internal successors, (3621), 1222 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 3621 transitions. [2021-08-21 18:09:25,635 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 3621 transitions. Word has length 33 [2021-08-21 18:09:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:25,635 INFO L470 AbstractCegarLoop]: Abstraction has 1223 states and 3621 transitions. [2021-08-21 18:09:25,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 3621 transitions. [2021-08-21 18:09:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:09:25,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:25,637 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:25,672 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 18:09:25,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:25,837 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:09:25,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:25,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2126551079, now seen corresponding path program 29 times [2021-08-21 18:09:25,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:25,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872021328] [2021-08-21 18:09:25,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:25,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:26,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:26,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872021328] [2021-08-21 18:09:26,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872021328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:26,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293007679] [2021-08-21 18:09:26,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:09:26,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:26,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:26,095 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 18:09:26,095 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 18:09:32,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:09:32,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:09:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:09:32,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2021-08-21 18:09:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:33,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293007679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:33,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:33,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-08-21 18:09:33,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751054181] [2021-08-21 18:09:33,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 18:09:33,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 18:09:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:09:33,101 INFO L87 Difference]: Start difference. First operand 1223 states and 3621 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:33,937 INFO L93 Difference]: Finished difference Result 1433 states and 4151 transitions. [2021-08-21 18:09:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:09:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:09:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:33,940 INFO L225 Difference]: With dead ends: 1433 [2021-08-21 18:09:33,940 INFO L226 Difference]: Without dead ends: 1407 [2021-08-21 18:09:33,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 779.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1611, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:09:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-08-21 18:09:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1241. [2021-08-21 18:09:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.967741935483871) internal successors, (3680), 1240 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 3680 transitions. [2021-08-21 18:09:33,954 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 3680 transitions. Word has length 33 [2021-08-21 18:09:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:33,954 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 3680 transitions. [2021-08-21 18:09:33,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 3680 transitions. [2021-08-21 18:09:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:09:33,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:33,956 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:33,992 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 18:09:34,181 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,SelfDestructingSolverStorable132 [2021-08-21 18:09:34,181 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:09:34,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:34,182 INFO L82 PathProgramCache]: Analyzing trace with hash -266025665, now seen corresponding path program 30 times [2021-08-21 18:09:34,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:34,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271107222] [2021-08-21 18:09:34,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:34,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:34,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271107222] [2021-08-21 18:09:34,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271107222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885326659] [2021-08-21 18:09:34,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:09:34,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:34,425 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 18:09:34,425 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 18:09:40,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:09:40,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:09:40,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:09:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:09:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:09:41,215 INFO L354 Elim1Store]: treesize reduction 12, result has 76.5 percent of original size [2021-08-21 18:09:41,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 53 [2021-08-21 18:09:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:41,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885326659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:41,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:09:41,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-21 18:09:41,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479451071] [2021-08-21 18:09:41,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:09:41,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:09:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:09:41,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:09:41,690 INFO L87 Difference]: Start difference. First operand 1241 states and 3680 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:42,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:09:42,576 INFO L93 Difference]: Finished difference Result 1307 states and 3852 transitions. [2021-08-21 18:09:42,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:09:42,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 18:09:42,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:09:42,579 INFO L225 Difference]: With dead ends: 1307 [2021-08-21 18:09:42,579 INFO L226 Difference]: Without dead ends: 1294 [2021-08-21 18:09:42,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 916.4ms TimeCoverageRelationStatistics Valid=232, Invalid=1748, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:09:42,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-08-21 18:09:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1241. [2021-08-21 18:09:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 2.967741935483871) internal successors, (3680), 1240 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 3680 transitions. [2021-08-21 18:09:42,592 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 3680 transitions. Word has length 33 [2021-08-21 18:09:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:09:42,592 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 3680 transitions. [2021-08-21 18:09:42,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:09:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 3680 transitions. [2021-08-21 18:09:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 18:09:42,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:09:42,594 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:09:42,630 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 18:09:42,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-21 18:09:42,809 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr2INUSE_VIOLATION (and 7 more)] === [2021-08-21 18:09:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:09:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 606795195, now seen corresponding path program 31 times [2021-08-21 18:09:42,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:09:42,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646998735] [2021-08-21 18:09:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:09:42,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:09:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:09:43,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:09:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646998735] [2021-08-21 18:09:43,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646998735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:09:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47046724] [2021-08-21 18:09:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:09:43,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:09:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:09:43,028 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 18:09:43,030 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 18:09:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:09:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 18:09:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-21 18:09:49,841 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:09:49,859 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:09:49,859 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:09:49,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2021-08-21 18:09:50,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-21 18:09:50,042 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. [2021-08-21 18:09:50,043 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4INUSE_VIOLATION [2021-08-21 18:09:50,043 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6INUSE_VIOLATION [2021-08-21 18:09:50,043 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err0INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Err8INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err3INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Thread1of1ForFork1Err5INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err1INUSE_VIOLATION [2021-08-21 18:09:50,044 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location thread4Thread1of1ForFork4Err9INUSE_VIOLATION [2021-08-21 18:09:50,047 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:09:50,047 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:09:50,048 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:09:50 BasicIcfg [2021-08-21 18:09:50,049 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:09:50,049 INFO L168 Benchmark]: Toolchain (without parser) took 726194.82 ms. Allocated memory was 212.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 192.7 MB in the beginning and 740.2 MB in the end (delta: -547.5 MB). Peak memory consumption was 876.2 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:50,049 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 212.9 MB. Free memory was 194.0 MB in the beginning and 194.0 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:09:50,049 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.54 ms. Allocated memory is still 212.9 MB. Free memory was 192.7 MB in the beginning and 191.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:50,049 INFO L168 Benchmark]: Boogie Preprocessor took 25.23 ms. Allocated memory is still 212.9 MB. Free memory was 191.2 MB in the beginning and 190.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:50,049 INFO L168 Benchmark]: RCFGBuilder took 303.48 ms. Allocated memory is still 212.9 MB. Free memory was 190.0 MB in the beginning and 173.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:50,050 INFO L168 Benchmark]: TraceAbstraction took 725844.09 ms. Allocated memory was 212.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 172.7 MB in the beginning and 740.2 MB in the end (delta: -567.5 MB). Peak memory consumption was 856.2 MB. Max. memory is 8.0 GB. [2021-08-21 18:09:50,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 212.9 MB. Free memory was 194.0 MB in the beginning and 194.0 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.54 ms. Allocated memory is still 212.9 MB. Free memory was 192.7 MB in the beginning and 191.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.23 ms. Allocated memory is still 212.9 MB. Free memory was 191.2 MB in the beginning and 190.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 303.48 ms. Allocated memory is still 212.9 MB. Free memory was 190.0 MB in the beginning and 173.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 725844.09 ms. Allocated memory was 212.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 172.7 MB in the beginning and 740.2 MB in the end (delta: -567.5 MB). Peak memory consumption was 856.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 1917, positive: 1658, positive conditional: 1658, positive unconditional: 0, negative: 259, negative conditional: 259, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1675, positive: 1658, positive conditional: 0, positive unconditional: 1658, negative: 17, negative conditional: 0, negative unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 291, positive: 289, positive conditional: 0, positive unconditional: 289, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 291, positive: 289, positive conditional: 0, positive unconditional: 289, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1675, positive: 1369, positive conditional: 0, positive unconditional: 1369, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 291, unknown conditional: 0, unknown unconditional: 291] , Statistics on independence cache: Total cache size (in pairs): 291, Positive cache size: 289, Positive conditional cache size: 0, Positive unconditional cache size: 289, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Independence queries for same thread: 242 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-7-1 term,while PolyPacSimplificationTermWalker was simplifying 7 xjuncts wrt. a ATOM-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 725661.7ms, OverallIterations: 135, TraceHistogramMax: 2, EmptinessCheckTime: 199.4ms, AutomataDifference: 162930.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 179.3ms, PartialOrderReductionTime: 165.5ms, HoareTripleCheckerStatistics: 5895 SDtfs, 22406 SDslu, 80701 SDs, 0 SdLazy, 109000 SolverSat, 12264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44762.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8965 GetRequests, 2835 SyntacticMatches, 196 SemanticMatches, 5934 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73458 ImplicationChecksByTransitivity, 149277.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1241occurred in iteration=133, InterpolantAutomatonStates: 4693, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1453.4ms AutomataMinimizationTime, 134 MinimizatonAttempts, 19540 StatesRemovedByMinimization, 133 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 855.9ms SsaConstructionTime, 2830.1ms SatisfiabilityAnalysisTime, 111817.9ms InterpolantComputationTime, 8667 NumberOfCodeBlocks, 8667 NumberOfCodeBlocksAsserted, 411 NumberOfCheckSat, 8400 ConstructedInterpolants, 0 QuantifiedInterpolants, 159813 SizeOfPredicates, 1763 NumberOfNonLiveVariables, 18648 ConjunctsInSsa, 5107 ConjunctsInUnsatCore, 267 InterpolantComputations, 1 PerfectInterpolantSequences, 13/1364 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown